Vista - Black screen while playing video or games

Hi to all, it seems like Microsoft loves for users to get angry about
problems in new versions so then they can put the fixes, it's much more
cheaper than pay to good engenieering staff.

Any way, since i can't change that, well, here is the thing:

Usually i'm a power saving user, so i set up the screen to power off after
10 or 15 minutes, the PROBLEM is if i'm playing a video game or watching a
movie with WMP 11 or Media Player classic, or whatever, with the exception of
IE7, after the 15 minutes the screen goes black, or powered off. It seems
like it doesn't UNDERSTAND that i'm using the machine, so the timer triggers
and i need to move the mouse or press a key to put it online again.

Any suggestions?

Thanks to all.
Nicolas
URUGUAY, best country ever.