I am not sure what you are asking, but any low profile graphics card should fit just fine, and are available at most electronics stores such as fry's, newegg.com, or local computer stores.
If you are referring to the driver for the onboard Intel 915G, then there isn't a Windows 7 driver available (or Vista either) as Intel dropped support for it a long time ago,
If you want to add a video card to it that does have Windows 7 support we can help with that. We would need to know which of the three different variations that model of Comapq yours is, as one of them doesn't have a PCI-E slot,