I purchased WinRescue 2000 when I first started using Windows 2000 for this reason. Here is a link for you to take a look at it if you like. It does not do exactly the same thing as System Restore in Windows XP but it does backup the registry and by configuring it you can also backup other folders that you might wish to protect. It is not free.
http://superwin.com/rescue2k.htm

