Thanks, Tony. I eventually got to this (it was the enabling plugins part that I didn't know I had to do), and tried it out.

I wasn't aware that this isn't just a plugin to move your mouse around. I really don't need those capabilities (though they are cool), so I got rid of it. I did, however, find a thread on the Girder forums (by Bitmonster, I think), in which he posted a mouse group. It really works amazingly well! Nearly as good as the ATI software! It's a little slow, but the transition between directions is seemless and all the movement is very smooth.

So now I'm all set with everything programed for myHTPC. I can do nearly everything by remote in that program now, even fast forward and rewind video files (very cool). The only thing I can't seem to do is map a shorcut to the remote that will alternate full screen video mode. Oh well, no big deal.