diff --git a/djangoapps/courseware/capa/responsetypes.py b/djangoapps/courseware/capa/responsetypes.py
index 380ab85c56..3159b70d5c 100644
--- a/djangoapps/courseware/capa/responsetypes.py
+++ b/djangoapps/courseware/capa/responsetypes.py
@@ -66,10 +66,8 @@ class GenericResponse(object):
 #-----------------------------------------------------------------------------
 
 class MultipleChoiceResponse(GenericResponse):
-    '''
-    Example: 
-
-    <multiplechoiceresponse direction="vertical" randomize="yes">
+    # TODO: handle direction and randomize
+    snippets = [{'snippet': '''<multiplechoiceresponse direction="vertical" randomize="yes">
      <choicegroup type="MultipleChoice">
         <choice location="random" correct="false"><span>`a+b`<br/></span></choice>
         <choice location="random" correct="true"><span><math>a+b^2</math><br/></span></choice>
@@ -77,10 +75,7 @@ class MultipleChoiceResponse(GenericResponse):
         <choice location="bottom" correct="false"><math>a+b+d</math></choice>
      </choicegroup>
     </multiplechoiceresponse>
-
-    TODO: handle direction and randomize
-
-    '''
+    '''}]
     def __init__(self, xml, context, system=None):
         self.xml = xml
         self.correct_choices = xml.xpath('//*[@id=$id]//choice[@correct="true"]',
@@ -218,8 +213,9 @@ class NumericalResponse(GenericResponse):
 class CustomResponse(GenericResponse):
     '''
     Custom response.  The python code to be run should be in <answer>...</answer>.  Example:
+    '''
 
-    <customresponse>
+    snippets = [{'snippet': '''<customresponse>
     <startouttext/>
     <br/>
     Suppose that \(I(t)\) rises from \(0\) to \(I_S\) at a time \(t_0 \neq 0\)
@@ -237,9 +233,10 @@ class CustomResponse(GenericResponse):
     if not(r=="IS*u(t-t0)"):
         correct[0] ='incorrect'
     </answer>
-    </customresponse>
+    </customresponse>'''}]
     
-    Alternatively, the check function can be defined in <script>...</script>  Example:
+
+    '''Footnote: the check function can also be defined in <script>...</script>  Example:
 
 <script type="loncapa/python"><![CDATA[
 
diff --git a/djangoapps/courseware/content_parser.py b/djangoapps/courseware/content_parser.py
index d557e5ac36..9d8811307f 100644
--- a/djangoapps/courseware/content_parser.py
+++ b/djangoapps/courseware/content_parser.py
@@ -218,6 +218,7 @@ def section_file(user, section, coursename=None, dironly=False):
     Given a user and the name of a section, return that section.
     This is done specific to each course.
     If dironly=True then return the sections directory.
+    TODO: This is a bit weird; dironly should be scrapped. 
     '''
     filename = section+".xml"
 
diff --git a/djangoapps/courseware/modules/seq_module.py b/djangoapps/courseware/modules/seq_module.py
index 00350f0c62..af41d0e8da 100644
--- a/djangoapps/courseware/modules/seq_module.py
+++ b/djangoapps/courseware/modules/seq_module.py
@@ -20,7 +20,9 @@ class Module(XModule):
 
     @classmethod
     def get_xml_tags(c):
-        return ["sequential", 'tab']
+        obsolete_tags = ["sequential", 'tab']
+        modern_tags = ["videosequence"]
+        return obsolete_tags + modern_tags
         
     def get_html(self):
         self.render()
@@ -81,7 +83,8 @@ class Module(XModule):
         params={'items':self.contents,
                 'id':self.item_id,
                 'position': self.position,
-                'titles':self.titles}
+                'titles':self.titles, 
+                'tag':self.xmltree.tag}
 
         # TODO/BUG: Destroy JavaScript should only be called for the active view
         # This calls it for all the views
@@ -90,7 +93,7 @@ class Module(XModule):
         # IDs to sequences. 
         destroy_js="".join([e['destroy_js'] for e in self.contents if 'destroy_js' in e])
 
-        if self.xmltree.tag == 'sequential':
+        if self.xmltree.tag in ['sequential', 'videosequence']:
             self.init_js=js+render_to_string('seq_module.js',params)
             self.destroy_js=destroy_js
             self.content=render_to_string('seq_module.html',params)
diff --git a/djangoapps/courseware/modules/vertical_module.py b/djangoapps/courseware/modules/vertical_module.py
index f64e45fe7f..e57a58e33e 100644
--- a/djangoapps/courseware/modules/vertical_module.py
+++ b/djangoapps/courseware/modules/vertical_module.py
@@ -13,7 +13,7 @@ class Module(XModule):
 
     @classmethod
     def get_xml_tags(c):
-        return ["vertical"]
+        return ["vertical", "problemset"]
         
     def get_html(self):
         return render_to_string('vert_module.html',{'items':self.contents})
diff --git a/djangoapps/courseware/modules/x_module.py b/djangoapps/courseware/modules/x_module.py
index 0898ac4f8f..b475fd0280 100644
--- a/djangoapps/courseware/modules/x_module.py
+++ b/djangoapps/courseware/modules/x_module.py
@@ -17,6 +17,39 @@ class XModule(object):
         ''' Tags in the courseware file guaranteed to correspond to the module '''
         return []
         
+    @classmethod
+    def get_usage_tags(c):
+        ''' We should convert to a real module system
+            For now, this tells us whether we use this as an xmodule, a CAPA response type
+            or a CAPA input type '''
+        return ['xmodule']
+
+    def __init__(self, system = None, xml = None, item_id = None, 
+                 json = None, track_url=None, state=None):
+        ''' In most cases, you must pass state or xml'''
+        if not item_id: 
+            raise ValueError("Missing Index")
+        if not xml and not json:
+            raise ValueError("xml or json required")
+        if not system:
+            raise ValueError("System context required")
+
+        self.xml = xml
+        self.json = json
+        self.item_id = item_id
+        self.state = state
+
+        if system: 
+            ## These are temporary; we really should go 
+            ## through self.system. 
+            self.ajax_url = system.ajax_url
+            self.tracker = system.track_function
+            self.filestore = system.filestore
+            self.render_function = system.render_function
+        self.system = system
+
+    ### Functions used in the LMS
+
     def get_completion(self):
         ''' This is mostly unimplemented. 
             It gives a progress indication -- e.g. 30 minutes of 1.5 hours watched. 3 of 5 problems done, etc. '''
@@ -45,6 +78,12 @@ class XModule(object):
         '''
         return "Unimplemented"
 
+    # TODO: 
+    # def get_header_js(self):
+    #     ''' Filename of common js that needs to be included in the header
+    #     '''
+    #     raise NotImplementedError
+
     def get_init_js(self):
         ''' JavaScript code to be run when problem is shown. Be aware
         that this may happen several times on the same page
@@ -63,17 +102,30 @@ class XModule(object):
             get is a dictionary-like object ''' 
         return ""
 
-    def __init__(self, system, xml, item_id, track_url=None, state=None):
-        ''' In most cases, you must pass state or xml'''
-        self.xml = xml
-        self.item_id = item_id
-        self.state = state
+    ### Functions used in the CMS
+    def get_xml(self):
+        ''' For conversions between JSON and legacy XML representations.
+        '''
+        if self.xml: 
+            return self.xml
+        else: 
+            raise NotImplementedError
 
-        if system: 
-            ## These are temporary; we really should go 
-            ## through self.system. 
-            self.ajax_url = system.ajax_url
-            self.tracker = system.track_function
-            self.filestore = system.filestore
-            self.render_function = system.render_function
-        self.system = system
+    def get_json(self):
+        ''' For conversions between JSON and legacy XML representations.
+        '''
+        if self.json: 
+            raise NotImplementedError
+            return self.json # TODO: Return context as well -- files, etc. 
+        else: 
+            raise NotImplementedError
+
+    def handle_cms_json(self):
+        raise NotImplementedError
+
+    def render(self, size):
+        ''' Size: [thumbnail, small, full] 
+        Small ==> what we drag around
+        Full ==> what we edit
+        '''
+        raise NotImplementedError
diff --git a/djangoapps/courseware/views.py b/djangoapps/courseware/views.py
index 313259bdb7..014f759ed1 100644
--- a/djangoapps/courseware/views.py
+++ b/djangoapps/courseware/views.py
@@ -60,7 +60,6 @@ def profile(request, student_id = None):
     if student_id == None:
         student = request.user
     else: 
-        print content_parser.user_groups(request.user)
         if 'course_admin' not in content_parser.user_groups(request.user):
             raise Http404
         student = User.objects.get( id = int(student_id))
@@ -184,16 +183,28 @@ def index(request, course=None, chapter="Using the System", section="Hints"):
         log.exception("Unable to parse courseware xml")
         return render_to_response('courseware-error.html', {})
 
-    dom_module = dom.xpath("//course[@name=$course]/chapter[@name=$chapter]//section[@name=$section]/*[1]", 
+    #dom_module = dom.xpath("//course[@name=$course]/chapter[@name=$chapter]//section[@name=$section]/*[1]", 
+    dom_module = dom.xpath("//course[@name=$course]/chapter[@name=$chapter]//section[@name=$section]", 
                            course=course, chapter=chapter, section=section)
 
+    #print "DM", dom_module
+
     if len(dom_module) == 0:
-        module = None
+        module_wrapper = None
     else:
-        module = dom_module[0]
+        module_wrapper = dom_module[0]
 
-    module_ids = dom.xpath("//course[@name=$course]/chapter[@name=$chapter]//section[@name=$section]//@id", 
-                           course=course, chapter=chapter, section=section)
+    if module_wrapper == None:
+        module = None
+    elif module_wrapper.get("src"):
+        module = content_parser.section_file(user=user, section=module_wrapper.get("src"), coursename=course)
+    else:
+        module = etree.XML(etree.tostring(module_wrapper[0])) # Copy the element out of the tree
+
+    module_ids = []
+    if module:
+        module_ids = module.xpath("//@id", 
+                                  course=course, chapter=chapter, section=section)
 
     if user.is_authenticated():
         module_object_preload = list(StudentModule.objects.filter(student=user, 
@@ -305,7 +316,7 @@ def quickedit(request, id=None):
     Maybe this should be moved into capa/views.py
     Or this should take a "module" argument, and the quickedit moved into capa_module.
     '''
-    print "WARNING: UNDEPLOYABLE CODE. FOR DEV USE ONLY."
+    print "WARNING: UNDEPLOYABLE CODE. FOR CONTENT DEV USE ONLY."
     print "In deployed use, this will only edit on one server"
     print "We need a setting to disable for production where there is"
     print "a load balanacer"
diff --git a/templates/seq_module.js b/templates/seq_module.js
index 5fa4070fca..691cbb5544 100644
--- a/templates/seq_module.js
+++ b/templates/seq_module.js
@@ -53,7 +53,7 @@ function disablePrev() {
 function ${ id }goto(i) {
   log_event("seq_goto", {'old':${id}loc, 'new':i,'id':'${id}'});
 
-  postJSON('${ MITX_ROOT_URL }/modx/sequential/${ id }/goto_position',
+  postJSON('${ MITX_ROOT_URL }/modx/${tag}/${ id }/goto_position',
   {'position' : i });
 
   if (${ id }loc!=-1)