Does anyone have any experience using the ExternalFile product in conjunction with Plone? I've successfully made some minor modifications to it (added a few additional properties) and it works fine through the management interface, however I need to allow my users to upload new ExternalFiles without using the ZMI.

What appears to be happening is that when attempting to access the manage_addObjectViaGui() function while not in the ZMI zope gives me a 404 error. Since it works fine through the ZMI I'm guessing this is a permissions issue?

I'd really appreciate any input or insights on this, it's a big part of a co-op project I'm working on that's coming down to the wire.

Probably your problem is that you're not using manage_addProduct. See the ZopeLabs recipe http://www.zopelabs.com/cookbook/1012279676 However, check out http://www.zope.org/Members/jeffsasmor/CMFOptions That'll give you a CMF-ized version, or help you CMF-ize ExternalFile if it doesn't do what you want. FWIW, CMF-izing a product is basically 1) creating a new type, so that it is integrated into the CMF factory/types machinery, and 2) creating the skins to support adding, editing, and display --jcc