If you own a Logitech mouse, you may want to check this utility out. There are a lot of buttons on the MX 310, 500, 510, 700 and 1000. While the built-in button-mapping tool is sufficient for some people, some diehard gamers have not been big fans. So along comes LogiGamer, a small app that lets you use any button on the mouse for any purpose.
From the website:
LogiGamer also allows for the profile to be automatically applied when the associated application is launched, and for the default profile to be applied when the associated application exits.
Features:
Create Profiles that allow you to easily use ALL your mouse button in games.
Quickly Switch between Mouse Profiles for games & other applications .
Automatically Apply Profile on Game Launch (auto-detect) & auto-switch back to default profile when game exits.
Command Line Parameters to apply profiles from shortcuts/batch files.
Edit the list of †œcompatible gamesÃƒÂ¢Ã¢â€šà ¬Ã‚Â and set advanced mouse driver options.
Look see here