Do you also prefer to have your Taskbar buttons in a certain order?
Years ago, I used something Button Boogie. It was cool enough, but didn't work on XP, and free support was ended. That is, they made one for XP, but it was not free.
So then I found Taskarrange, a bit of freeware that worked in XP. It was small, worked fine, but wasn't very elegant. 'Way better than nothing, and free.
But it doesn't work in Vista, and my previous email thanking the creator of Taskarrange was returned.
Then I found Taskbar Shuffle. It works with XP and Vista, and is a very nice interface. You can just drag the buttons into the order you want.
Plus you can even rearrange the system tray icons!
Cool. No problems so far. I recommend it.