There's really no way to do several frames at once since they are in fact different files. What you could do is set up an action so you can open the files, add the paint daub effect, and then resave the file and close it. This will at least make it much faster, especially if the paint daub won't move on the image sequence. HTH
fire*, smoke*, photoshopCS2
Charlotte Public Television
Photoshop CS3 Extended (and maybe the normal version, but I don't think so) allows you to edit movies/image sequences as a single file. You still have to go forward and back a frame at a time, but it makes things much easier.
Darby Edelen DVD Menu Artist Left Coast Digital Aptos, CA