Great forum here! I have just started scripting for After Effects in my new place of work, lubricating the graphics pipeline for interactive DVD authoring. We've needed to deal with exporting large numbers of compositions with particular render settings, which is quite manually intensive to set up.
At first I made a script specific to the project, and it proved so useful I decided to make a general purpose version with a GUI. Im really surprised that the ScriptUI side of things barely gets a mention in the After Effects documentation.
Anyway, heres my first 'sort-of-complete' script! Im sure you'll find a way to break it, but if you treat it gently with good input, it should do as you ask
http://chrishatton.homeip.net/?page_id=23
Regards,
Chris