W2K by standard puts your devices in ACPI mode and put them on very few IRQ's. It can be solved by switching to "standard pc". Here is an instruction from another guy. (Don't remember who it was, but a big thx to him)
<< It's ACPI ... Windows' power management control system. I'll tell you a way to have your IRQ's back, but prepare to have some install disks ready. It won't format, but all your hardware will be rescanned and reinstalled.Go to Control panel / System / Hardware. Click on "Device Manager". Double click "Computer", then right click "Advanced Configuration blablabla". Go to Driver, then click on "update driver". Click next. Select "Display a list of blablabla". Wait. Click on "Show all hardware...". Select Standard PC. Now just follow the steps. After you reboot, all your hardware will be rescaned and stuff. Some guy said that his Quake III performance doubled after this, mainly because his VGA card was sharing the same IRQ with sound/NIC/modem/usb stuff. >>
This is the way to do it when W2K is installed and you don't want to reinstall.
The best way to do this though, is to press F5 during setup where it asks you to press F6 for installing of extra drivers. This will allow you to choose "standard pc" from the beginning
PS: You could get the problem of the computer comming with the "You can turn off your puter" when you shut it down. This can be solved by installing the "NT/APM legacy support" (you have to show hidden devices to see it)