Webcam motion capture software advice needed

I'm looking to get hold of a package that allows me to setup my webcam for motion capture. I've tried a bunch of freebie ones and so far they were all crap. I need to be able to select a folder for the program to record avi files whenever it detects motion. Something like it detects movement and so begins recording for a minute or such. It has to be video recording as pictures are useless. I also need it to be able to deal with anything upto about 15 cameras, and save them all to individual folders. Any suggestions?

I believe that the Willing Webcam software can help you.
See the Motion detection->Actions -> Capture video options.
Don't forget to enable the Movie save feature and disable its Cycle option.