Trying to upgrade video on P3 Gateway
 

A client of mine has a bunch of Pentium 3 Gateway PCs with on-board
graphics, and the motherboard has no AGP slot, only 2 PCI slots. They need
to upgrade graphics to support a software program. The current built-in
Intel graphics chip is not fully supported by the software, so the colors do
not render properly, regardless of the drivers I install or the settings I
try.

I know there are newer PCI video cards that might otherwise work, but the
problem is I cannot disable the on-board video in the BIOS. Therefore, when
I install a PCI video card, Windows XP sees it as a second graphics card and
treats it as if it were a secondary display, and it allows it only very low
resolution. I need the PCI video card to be seen as the only available one.

Any ideas how to make this happen. I thought about uninstalling the Intel
drivers. Would the system then default to the PCI card?

thank you,

jm