I have an optical MS intellipoint 5-button mouse. However, I cannot stand OS X's lack os mouse acceleration. So I downloaded the drivers from MS so I could adjust it, and it made my mouse work perfectly. After doing this, I was unable to use my extra mouse buttons for expose' - it did not have the option of assigning the buttons to it (it overrides the default settings in expose's prefpane). I tried mousezoom, and all that did was speed up the speed, without adding acceleration, so that was no good. And I cant use the logitech drivers with my MS mouse. Does anyone know what I can do to get mouse acceleration, without disabling my ability to use my extra buttons for expose'?