If you're familiar with 'msconfig' in WIN98, you can copy that file and put it into Windows 2000 here:
C:\WINNT\System32
Then just do Start>Run>msconfig as usual. But unlike WIN98, you won't get the the other tools in the usual System Configuration Utility (config.sys, autoexec.bat, etc). But those are already located elsewhere in Win2k.
You can also copy the the msonfig file from WinXP (or whistler) - it works just fine with Win2k.