In My PCLinuxOS-2009.2-KDE4 installation where I had installed the "NVIDIA-Linux-x86-96.43.16-pkg1.run" graphics driver, I deinstalled it with "CC=gcc-4.4.1 && NVIDIA-Linux-x86-96.43.16-pkg1.run --uninstall" and then I ran "video" to see what would happen when I tried to set up the vga driver.
I could not get the vga driver to start with startx, no matter what different display settings and options I tried. One setting with a resolution of 1024 x 768 @ 8bpp did present a screen full of hash in the test phase, but nothing else I tried worked. Maybe if I had tried 640 x 480, it might have worked, but that setting is what Windows uses in Safe Mode and sometimes it is impossible to see everything that's on the screen.
I finally selected the "nv" driver and accepted the default display settings that were presented me and then I could start the X server.
I did all of this for this installation because I could afford to foul it up, since it was kind of a test installation for KDE4 anyway.
My hope is that the new graphics card will also accept the "nv" driver, or I might not be able to get it installed.