Enable working copy support for custom types

Make a file in profiles/default/diff_tool.xml:

<?xml version="1.0"?>
<object>
  <difftypes>
    <type portal_type="MyCustomType1">
     <field name="any" difftype="Compound Diff for AT types"/>
    </type>
    <type portal_type="MyCustomType2">
     <field name="any" difftype="Compound Diff for AT types"/>
    </type>  </difftypes>
</object>

Add file Install.py

 from StringIO import StringIO

from Products.CMFCore.utils import getToolByName
from Products.CMFEditions.setuphandlers import DEFAULT_POLICIES

# put your custom types in this list

TYPES_TO_VERSION = ('MyCustomType1','MyCustomType2')

def setVersionedTypes(portal):
    portal_repository = getToolByName(portal, 'portal_repository')
    versionable_types = list(portal_repository.getVersionableContentTypes())

    for type_id in TYPES_TO_VERSION:

        if type_id not in versionable_types:

            # use append() to make sure we don't overwrite any
            # content-types which may already be under version control

            versionable_types.append(type_id)

            # Add default versioning policies to the versioned type

            for policy_id in DEFAULT_POLICIES:

                portal_repository.addPolicyForContentType(type_id, policy_id)

    portal_repository.setVersionableContentTypes(versionable_types)

def importVarious(context):
         portal = context.getSite()
         setVersionedTypes(portal

Add in __init__.py

def importVarious(context):
        from Products.themewistar.Install import setVersionedTypes

        portal = context.getSite()
        setVersionedTypes(portal)