Thanks!

I was able to make 3 videos of 900 frames, 1280 x 720 in 72 pixels resolution, 300 frames each in avi.

Works, but..

It's better using images in Photoshop Extended anyway as you can adjust everything in photoshop before making your movie, such as sharpness, levels, color etc.

I'm still trying to figure out what would be best for an HD youtube vid, but I'm getting closer.

BTW, your scripts amaze me.