I want a diskless workstation system in computer lab, the server is linux, and I want the diskless node run windows 2000 or xp, I can only find some docs for windows 95/98, who can give me some tips?

This is usually done through Terminal Services or thin-client setups, e.g. a Windows Terminal Server and something like PXES on the clients.

Here's a commercial product for making a Linux server provide Windows sessions: http://www.win4lin.com/content/view/62/99/

I'd be really interested if somebody is successfully using diskless workstations with XP, but I'm not optimistic - NT relies unecessarily on disk swap files.

Thanks for help.
But I don't want to use commercial product in server side, I want use free software....
May mars_nwe be useful?

Well, remember that as soon as Windows enters the equation you are into proprietary software and licence fees. Microsoft require licences whether you deploy Windows to each station or access a central copy remotely. AIUI, the basic technical problem is that Windows expects to be running with access to a hard drive, so you either have a drive in each workstation or have a copy of Windows on the server using the server's hard drive and provide remote desktop access to that central copy.

The only other option that I know of is to circumvent the problem by ditching Windows... Either by using WINE to run the specific Windows apps you need on a Linux OS, or replacing the whole lot with Free Software so you aren't bound by any EULA.

I've never used Mars, but I beleive that it enables a Linux box to emulate older versions of Netware server ?