Hi, I'm pretty new to Zope & Python, and have been making my way through several of the tutorials. Working with External Methods, one of the particularly useful pages came from the Advanced Zope Scripting in the Zope Book, and dealt with creating thumbnails. Everything worked as expected, but I'd like to extend the concept such that , from an External Method, I'd like to create a 'subfolder', then create the thumbnail in the sub-folder. When I prefix the thumbnail file_id with a folder name, I'm getting errors regarding invalid characters in a URL - (which appear to be the / characters separating the folder. I'm assuming this is pretty basic, but haven't been able to find anything on the subject. Any tips or suggestions on where to look, or possibly an Ext Method snippet which would create a sub-folder and a file within the sub-folder? TIA, -- Dan Cherry dscherry@bellsouth.net