download drivers for:
video card (which you listed your processor for this, although it may be integrated, i dunno)
motherboard drivers (check motherboard's site.. Typically, windows can assign a driver to onboard stuff, but won't be fully compatible, it's better to download all the motherboard drivers)
No real order when installing drivers. Typically, i always put the video driver in first, because if you don't, then your computer will look ugly, and most likely be running slugishly. Then, definately put all your motherboard drivers in.. Make sure you have your ethernet drivers, audio, video drivers. Your monitor should be plug & play, and you can get updated hard drive drivers, but those typically aren't necessary. When formatting with XP, just make sure to use NTSF...