I'm a Linux man, but i like Windows 2000 as wall for workstation... I still have it on my workstation, because i need to do some Win32 programming.
But the function you guys are talking about is located at:
Right click My Computer -> goto the fann named Advanced. Then click on the buttom System and Recovery. Theres a frame called System Failiur, and a checkbox called Automatic Reboot!
a long way for a little function!