Sorting by an objects folder position

Add a python script called folderPosition and insert the following code:

try:
  return context.getObjectPosition(context.getId())
except:
  return 0

Inside portal_skins/plone_scripts, there is a python script called folder_position, customize the script and replace the code with the following:

from Products.PythonScripts.standard import url_quote

if position.lower()=='up':
  context.moveObjectsUp(id)

if position.lower()=='down':
  context.moveObjectsDown(id)

if position.lower()=='top':
  context.moveObjectsToTop(id)

if position.lower()=='bottom':
  context.moveObjectsToBottom(id)

objs = context.objectValues()
for obj in objs:
  obj.reindexObject('folderPosition')

if position.lower()=='ordered':
  context.orderObjects(id)

msg="Item's position has changed."
response=context.REQUEST.RESPONSE
return response.redirect('%s/%s?portal_status_message=%s' % (context.absolute_url(), 'folder_contents', url_quote(msg)) )

Add a folderPosition field index to the portal_catalog using the indexes tab.