I didn't mean the command in ET.

I know ET has a command for acceleration, but it sucks really badly compared to the mouse driver acceleration, which feels a lot different than the ET config command.

It's hard to explain the pro's of acceleration, but once you get used to it it just feels like one smooth sensitivity. I love it, because I can switch really fast between targets, even if they are behind me, and that with the feeling of playing with a low sens.