I have a Microsoft mouse:

I bought it for gaming in Windows 7. I hate switching the magic mouse and this when restarting my comp, so I decided to stick with it.
One annoying thing with it is sensitivity (Believe me, very, very annoying!). I want to set it in Lion exactly the same as in Windows 7 value. I installed Microsoft intellipoint software for OS X too, but for some reason I never ever could set it the same value as in Windows.

The mouse pointer feels like "lagging" or sticking to a point for a moment sometimes, don't know why.
How can I do this? I mean is there a value in the registry somewhere and a .plist file in Mac OS X I should search for and set to the same value? Or do I need to buy an other mouse (this really drives me crazy)?