Clean register for hardware changed

Hi
It’s possible to clean Windows 2000 register for the entries with harware changed?
I have a PC for hardw aretrial purposes, with Windows 2000 Pro. Often I connect new hardware, try It and then remove It (graphics displays, LAN adaptors, hard discs, …) Windows 2000 detect the hardware and install It.
Now I have a problem: the register becomes big and big with all these entries, and I’m afraid about the 16 MB limit when Windows 2000 starts
I need a tool or a solution for clean all the entries on register that point to a piece of hardware not existent yet.
It’s possible to do that?
Any idea?
Thanks

Aaron