http://donewmouseaccel.blogspot.com/...ation-fix.html
There are also links for fixes in XP and Vista.
This is amazing and I'm sad I didn't find this sooner. It takes a while to get used to, but it helps your aim a whole lot.
Even if you turn off mouse acceleration (by turning "Enhance Pointer Prescision" off), there is still some acceleration being performed.
Look at the gifs on this page: http://donewmouseaccel.blogspot.com/...ration_28.html
Try this and let me know what you think. And if you've been using this, why the hell didn't you tell me sooner. :P
Edit: I think you might have to google the name of the file for the xp/vista fix since I think the direct link is down on that page.