Jesus I thought everyone knew ME was a lurking turd in the toilet!
Upgrade to WinXP professional, or downgrade to Win98se and add the Plus! pack to get the ME look if you want.
As far as moving his lan card, well it could cause more problems than it helps. Depends on what type of board he is running, chipset, and bios version. Also whether or not there is a SBLive card sitting in there causing problems by interferring with the IRQ frequency to th HDD which was the case in a few setups I have seen in the past. Some system worked great with an AGP video, sound in the 4th PC,LAN in the 2nd PCI, and nothing in the first PCI.
All depends really.