How to use 4 buttons mouse?

Fri Aug 8 16:00:04 PDT 2003

Hi Everybody!

Does anybody know how i can use 4-buttons mouse in FreeBSD 5.1
Do I need to rebuild Kernel?
Maybe I can just do some changes in my /etc/X11/X86Config ?
Now I am using option without "emulate3buttons" and I have 3 works buttons. 
But my mouse has 4!!!

And the next question. If I will have 4 buttons... How it configure in FreeBSD 
5.1?

Best Regards, Denis(Russia).