But if I wanted to try anyway I'd head to HP.
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?cc=us&lang=en&prodSeriesId=3232028
I'd update my machine with all the Windows 7 32 bit items and for the video try the Vista 32 bit video driver and hope.
At least there's a slot to put in a supported card.
Bob
I recently bought a HP DC7700 with a built in nvidia geforce 6100 Go graphics card. I installed the windows x86 driver from windows update because it is not available anywhere else. Everything looked fine but then when I go to play a video with windows media player or videolan there is no video just a black space.
Also when I start windows media center there is nothing but a black screen in both full and partial screen mode.
When areo is enabled the computer wont even display the desktop so I use the windows classic them.
The system has 2gb ram with 500mb used at start up and an amd x64 processor, this problem occurred on a x64 windows 7 I had installed before and still occurs on the x86 windows 7. I know the geforce 6100 go has enough power to play a video and do areo so I am at my wits end.
Any help would be appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic