Bought new PCI graphics card but windows XP is set up for AGP so it blacks out when XP boots up.How to fix ?

It is a Standard PCI Nvidia graphics card.It seems my Windows XP is not set up for it.I think it is set up for AGP.So I set up my bios to run PCI but how do I do this to operating system.My onboard Video card now does the exact opposite which is AGP.It doesnt show [...] http://bit.ly/jgs16v