Hmm, what's stopping you from using the ATI player? Is it integrated with the drivers? As far as I can tell, seperate program like that will run just as normal programs.
I first thought that the ati file player has to detect the ati card, but I wasnt going to try it. Just wondering if thre is something out there. I liked the ati file player beacuse when you resize it, it keeps the ratio of that video file.