Update: I fixed the annoying bug of where it would say "I can't follow that" when autofollow after combat was enabled.
Added a few more features and cleaned up the code abit. I will upload the newest version to one of the above mentioned websites that host addons when I get off work in the morning.

On another note. I think I have figured out the best way of running 5 WoW's on the same computer with my current hardware setup.
Q6600 = quad core 2.4ghz
8800 GTS 320
3GB of ram.

Using the utility I mentioned above named process, what I do in AHK is once all the wow.exe's are loaded it changes the affinity of all of them so they are all able to use all 4 CPU's. Then everytime I swap windows it also changes the priorities on the fly so that the foreground WoW gets "high" priority, and all the others get "belownormal" priority.

I will look at possibly going with ace for my addon. It currently does not utilize any of the ace libraries, it's all self contained. WoW interface.com REQUIRES screen shots, which is kinda dumb if they addon does not have any GUI to it. I need to take a closer look at curse's and see about uploading there.