Thanks Whappo, I've been to that site but can't make heads or tail out of it. My Mp4 says it supports mpeg4 avi. It will not read mpg or wmv files. It comes with two short video clips. Is there a way to tell what video codec these clips were made with. Also, it comes with aviconverter 3.0 software which unfortunetly does not work in Vista x64. Windows shows the detail of these clips as 320x240, data rate 94 kbps, total bitrate 128 kbps, 20 f/s and the audio as 128kbps. Does this help.