Hi. I have been working on a product in that works with filesystem content for CMF. I have my content types developed and they are all registered and working fine but my hitch has to do with edit and views screens. I want to emulate the way that the ZMI handles things because the manage_main screen is smart enough to display an edit area if content type is text/html etc. while it will display binary files without an edit area etc. Where is manage_main for ZMI located to look at what it is doing so that I can potentially emulate its behavior in my edit and view ZPT? I am not certain how many behaviors it has based on the type it gets - maybe there are really only a few. Alternatively, if there are suggestions on what I could do in my ZPT to display the right view based on the object's content type, this would be quite welcome. I don't want to resort to constructing a list of all content types (mime types) and testing against these so am hoping I can hook into zope's functionality that is already doing this for ZMI. Many thanks. David