Installing the loopback adapter in WIn2k is very similar to NT 4.0. I believe the only differnce is the name.
NT 4.0 uses Network Neighborhood
WIn 2k uses My Network Places.
If memory serves me right in Win 2k just right click on my network places and choose properties. Or from control panel double click on the Network or My Network Places Icon to bring up the Networking properties.
If you still can't install the loop back adapter in Win2k. Try this
Look around for "install windows components" in Control Panel.
From there you should be presented with a window with a scroll bar. In the network compontents you should find MS Loopback Adapter. Be sure to have your Win 2k disks handy and assign some ip address. The standard 192.168.0.1 should do or whatever.
I hope the helps...remember I'm only going by memory, I've tossed my Win2k installation.
I used to use MS Loopback Adapter in the place of a NIC in my MAX days to implement Batch rendering.
Good Luck
Trickster--~>DSL