Aww, thanks! CS3 doesn't use ImageReady, though. :\ From my understanding, the functions of ImageReady were incorporated into Photoshop itself. I'm using the Scripts-->Load Files into Stacks command (sounds like the second option you mentioned) since I'm working with screencaps now.

I have the toughest time settling on a frame rate (which seems especially hard when the caps skip a lot of frames. So glad I found anastdean's caps for SPN. I'll totally have to look for a CS3 tut for importing video for when I can't find frame-by-frame caps.), and making sure that any image optimizations I make are applied to all layers.