I'm going to answer my own question for now, since it seems to already be fading completely out of the spotlight.
Through all my research I've come to the conclusion there is not any way to do this cleanly and simply. I could very well be wrong, but after three days of looking I have yet to find an answer, so for now I will assume that there is not a currently existing 3rd party program to allow this on a Mac.
However, someone on stack overflow suggested that I program a basic application to run in the background to accomplish this goal using Cocoa, and so that is what I will be doing unless someone comes up with a faster/easier/cleaner solution and posts it here.
Here is that post from stack overflow:
http://stackoverflow.com/questions/8188193/limiting-mouse-to-one-display-on-mac-potentially-using-cocoa/8188310#8188310https://stackoverflow.com/questions/8188193/limiting-mouse-to-one-display-on-mac-potentially-using-cocoa/8188310#8188310
I will be monitoring this just in case some one does answer it other than me.