Getting my Intellimouse Explorer to work

I got a really good deal on two wireless Microsoft Intellimouse Explorer mice a while back (thanks to SlickDeals.net) and I’ve had some luck using them under Linux. For some reason my most current installation (I reinstall every few weeks) doesn’t want to cooperate. It’s something to do with my XF86Config file but I thought I had it set the same way as the last two or three times.
Anyway, if you’re trying to use your Intellimouse under Linux, then here’s the place I learned how to do it.