TOPIC: Image upload for registration?

Can any of you think of any way to implement this? (client needs to make badges for the event)
Preferably there would be a way to hack this into the registration process, but any cheat or workaround will work as well....

If I could get a file uploader hacked into the registration, I figure it could drop the files into a predetermined folder, and the registrants could just be instructed to name the image file with their own names?

I know I\'m probably going to get no replies on this, but any suggestions would be much appreciated.