Well, its a few problems I guess.
SignCut keeps crashing, so I think that is a software issue with Snow Leopard.
But then my second question is whether SignCut is compatible with my cutter. I tried the settings in that post, but they didn't work either.
Also, the one time I was able to run a preview cut, it appeared as though it was mapping a cut that would essentially cut across the design diagonally.