i've been trying to get my powerbook wallstreet 250 to play avi movies smoothly for the past year and have always had issues with the video pausing and skipping of me wiht the sound playing normally. right now, i have an extra 64mb ram card in to see how the machine will perform, and performance has improved, but the video is playing the same way. what could be causing the video to play like this right now? virtual memory is off, only the divx codec is in use (and it's all thats needed for this movie), and the machine is set to run at full speed while plugged in. the only reason i can think of for it to be playing so slowly is limited video ram, but i don't see how that could be it due to the fact that this machine is designed to play full-screen dvd movies. maybe the hard drive speed?