Well, I configured RedHat for a scroll mouse... should be the same.
I used imwheel to do it.  Can't remember where I found it, but do a search on google.com and it is probably the first one.  You will have to edit your XF86Config file by changing the pointer section.  The instructions are in the imwheel tar.
I believe the instructions go something like this:
un tar
configure
make
make install
edit /etc/X11/XF86Config ( I used vi) and change the protocol to IMPS/2 and one more I can't remember.
restart X
imwheel -k (add the k switch to kill any previous instances of it).
Hope this helps,