Friends computer wreaking havoc

My friend had a bunch of viruses on his computer so I reformatted his hard drive and installed winxppro. The only problem is that he can't find the disks that came with his computer and he needs a bunch of drivers to get everything working again normally.
I went searching around on various driver databases but I couldnt find anything to help me. His computer is a HP pavillion a422n. Yea I looked at hewlett packards website and they do a horrible job taking care of it, most of the site's links don't even work. Anyone have this same computer and could send me drivers or know exactly where I can find them?

thanks

sorry, I had protowall and peerguardian up when I went to the hp site, that's why it wasn't working

In any case, nm I got the drivers.