Wow, you just posted the question less than two hours ago! You have to be a little more patient. Also, this question belongs in the Home Theater Computers forum.
Having said that, I read your other post and see that you have a Phillips 55" 16:9 TV, right? You say you can't stand the low resolution and no wonder! Since this set cannot accept 800x600 I assume you have connected the s-video-out of your graphics card and that's what you're referring to as "low resolution". Well, if that's the case, you're not watching 800x600 at all! S-video-out is ALWAYS downconverted to 480i no matter what resolution you have your desktop set to. In order to take advantage of the progressive desktop resolution you must use the VGA-out port.
What kind of card do you have now? Most graphic cards DO have resolutions above 800x600. However, HDTV's DO NOT accept standard computer resolutions. You need to get a card that can do CUSTOM resolutions like a Radeon or GeForce. HDTV's will only accept 480i, 480p, and 540p/1080i resolutions at 60Hz ONLY. Any other resolution and the TV will not sync to it.
I suggest you post the question in the HTPC forum. You'll get a lot more replies there.
[This message has been edited by vruiz (edited 08-28-2001).]