in the old days you could convert your movie into a "filmstrip" (.FLM) and open that in PS to do stuff like "rotoscoping" but you had to be careful not to change the "image size" or the "canvas size" or you couldn't save it back as a flimstrip anymore.

now you can do what dreamer101 say's and do it in ImageReady without having to make it into a flimstrip format first.

dre, your question brings back memories... maybe i'll dig up some old movs and play in PS a bit!!

hope you've found your answer,
retrocity