9.0 + Win2000 = OK
Yes. Progress 9.0 work under win2000 very well
With out any patches.
If You make clear installation process on multirocessing system -
then all of You processors took part of work (I using 2 CPU).
If You only copy run-time files (like _progres.exe, _dbutil.exe, near 16Mb)
on the multiprocessing system - then only one CPU activated.