You can try these:
http://search.dell.com/results.aspx?k=R62200.exe%20&s=BSD&cat=supThey are from Dell's site, but based on various internet reports, they do work with MANY chipsets. You would need to know a specific chipset he's using and try to locate drivers from there if these don't work. (Why is he using NT4 anyway? He should upgrade to AT LEAST 2000).