[Zope] Sorting a list of folders based upon PART of the folder id

I have an application where a front-end constrains the ids of created folders so that they have some significance to the application. I'd like to be able to sort these folders using Python's sort facility, but I am having problems doing this within a Zope Page Template. As an example, I would like to be able to do an alphabetic sort of the folder IDs based upon the concatenation of the last and first characters of the idea. I suppose that I could create a Python module to do this, but I was hoping for a slick way to do it entirely within Zope. Suggestions appreciated. Also, has anyone written a SQL-like ORDER-BY or GROUP-BY sort routine for Zope/Python? Sean McLinden Allegheny County Health Department