I have just what you are looking for, Core Control
. It will give you the same abilities and "Limited User" in NT, W2k, or XP. You can lock out drives, controls, the ability to install software. I used it on my kids computer to stop them from installing everything on the net, when they were using ME. You will have a password that is effective. You will not be able to just hit "ESC" to circumvent it.
I hope that is what you were looking for. It is also list in the Freeware list.
Edited by acklan, 10 April 2007 - 11:12 PM.