ATI 9000 Pro video card

I put my own system together last week: P4, 2.53 GHZ, Intel 845PEBT2 MB, ATI
9000 Pro video, Kingston 512 MB Ram, IBM 120 GB HD. The problem: keep
getting blue screen "Page fault in non paged area" and sometimes the error
message changes a little and refers to the ATI driver or to "win32k.sys" or
the message says, "IRQ not less or Equal". I think I've narrowed the problem
down to the driver for this video card, cause when I remove the driver, I
don't get the BS. But I'm thinking it might be the RAM too. Until I can be
convinced that the problem is the driver, how can I in the mean time prevent
Windows XP Pro, from always asking me to install the driver for this card
when I boot up? Is there a way to turn this feature off? Also, is it
possible to change the IRQ for this card? The current IRQ is set at 16. The
card is an AGP card. Any help is appreciated, thanks. Oh, one more thing,
how can i permanently remove the ATI video driver from my system, cause even
though I've removed it from "add and remove" it still is able to install the
same driver when i go through the "add hardware wizard". The driver has got
to still be on my system somewhere and I don't know where it is. Thanks.