How can i remote control/desktop xp/linux machines?

hi guys! ive got quite some pcs here. i just garbage picked a dual xeon :-O and we have a dual athlon laying around...i dont have room for a 3rd or even 4th monitor (if i had room i would) for these 2 machines.

Id really like to use em as a renderfarm. is there any way i can get one of my monitors to go like, full screen to take complete control over an xp/linux desktop?

im sorry if this is such a newb question. Thanks in advance.

KVM switch if you want to take full control of them other wise there is always telnet/ssh access into them

VNC available on all platforms, mac windows and linux

thanks!

well i dug this up in case any other mmac users run across thisi question

http://www.microsoft.com/mac/downlo...ate_103.xml&secid=80&ssid=10&flgnosysreq=True

but its only for XP to OSX