Thats prolly cause NT4 drivers are (sometimes) usable by Win2k. I know XP has a few problems when using drivers designed for NT4, and for good reason- the kernel for NT is pretty old and alot has changed since then, especially with hardware interaction. This is the main reason clients of mine scrap their NT4 servers and replace em with 2K/XP boxes. Simple solution is of course just bring up the properties for the shared printer, tell it you wanna share it for Win2k and supply the latest driver files from the manufacturer. That fixes Printers, but not the various other problems one could get with NT4/Win2k/XP interactions.

(NT4 support has been discontinued too, so little luck in getting fixes or updates from MS)