Disk Clean up Windows 2000 Server

Hi,
I have a server that is in dire conditon with it’s disk space. I cannot defrag it due to the
lack of space. I’ve delted the Temp files, any
windows .scr files, templates that sort of thing.
Can anyone point me to a website or send me a list
of files that could be delted so I can regain enough space to run the defrag? I only have 200mb left on a mirrored 2gig drive.
Thanks!