Anybody know how I can render my 600 frames to individual .jpgs instead of to an .avi?

I can do this in VIZ, and I like it because if there's a problem w/ one of the render cows messing up some frames I can fix it easily and just re-render those frames w/out having to do the whole .avi, or if there's a network problem in the middle of the render, then I don't have to start all over again.

Thanks in advance for your help.

Fletch