I just got this PSP. I know that it uses .MP4, and that I need to put the video files in MP_ROOT --> MNV100 --> VIDEO. I have done all of that, but to no avail. I used iSquint to convert the .avi videos to .mp4. Can anyone chime in on this? I'm leaving for a week for business in about 4 hours, so any input before that would REALLY be appreciated! Oh, and I have the new 3.71 firmware. Thanks.