LogiGamer is a utility that allows you to create different mouse button profiles for different applications, typically games, and then apply these mouse buttons settings for use with an application.(A profile is a collection of mouse button settings and other information specific to an application.)
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.
The answer to my Logitech MX 1000 prayers.
Aaron Fulkerson 