If I ran the XP drivers in compatibility mode on Windows 7, would it work at all? I want to ideally install a GTX 460 into this system, but it only has 1 PCI-E connector and I can't find my molex adapter to make a second one, but I need it up and running ASAP. The Geforce FX 5200 is not supported on windows 7. /quote True, and I think that goes for the entire line of FX cards. As far as I know, NVIDIA never made a Windows 7 driver for those. Kingsoft if you aren't going to upgrade your hardware then you're probably better off with Windows XP.

The GeForce FX series graphics cards are supported under both the 32 bit and 64 bit versions of Microsoft Vista with the 96.85 WHQL drivers. Version 96.85 drivers are the final Windows Vista drivers for GeForce FX series graphics cards.
Click here for the Vista 32 version of the GeForce FX compatible driver.
https://www.geforce.com/drivers/results/2
Click here for the Vista 64 bit version of the GeForce FX compatible driver.

https://www.geforce.com/drivers/results/4

Nvidia Geforce Fx 5200 Windows 7

Please note that this applies only to the GeForce FX series.

Nvidia Geforce Fx 5200 Windows 7 32 Bit

GeForce FX products are Not supported in Windows 7 nor Windows 8.
For reference, here is a list of the GeForce FX based cards.
GeForce FX 5100
GeForce FX 5200
GeForce FX 5200LE
GeForce FX 5200 Ultra
GeForce FX 5500
GeForce FX 5600
GeForce FX 5600 Ultra
GeForce FX 5600SE
GeForce FX 5600XT
GeForce FX 5700
GeForce FX 5700VE
GeForce FX 5700 Ultra
GeForce FX 5700LE
GeForce FX 5800
GeForce FX 5800 Ultra
GeForce FX 5900
GeForce FX 5900 Ultra
GeForce FX 5900XT
GeForce FX 5900ZT
GeForce FX 5950 Ultra
GeForce PCX 5300
GeForce PCX 5750
GeForce PCX 5900