I`m currently running a CB TNT2 3d Card. I`m interested in also installing an ATI PCI card. What is the best procedure i should follow including driver installation to install this card.?

Well, whenever I've installed a second video card, I just plugged it in and went....

However, I had 2 PCI video cards. With one AGP, it'll be a bit different.

Some BIOS's allow you to choose which card you want to be your primary display card - if you have such an option, make sure to make it AGP, or else you'll be stuck with your "inferior" ATI PCI card as your primary display - I know someone who wasn't able to change this.....a real bummer

Otherwise, plug it in and go

Now if that was a Radeon I might not mind that too much but since its a earlier Ati card that just might piss me off! Thanks for the info.