Scrip to snapshot CPU and RAM usage on servers

Hi
I am tsaked with taking a snapshot of CPU and Memory usage on about 20 servers and loggin it.
At the moment I vnc onto each server and look in Task Manager and note them down in Excel.
Can anyone do me a script that snapshots CPU and RAM usage on all my servers and logs it in a central place (They are a mix of Win2k, Win2003 and a couple of XP machines)
Its very laborious doing it the way I am now
Thanks hugely!
Matt