Well have heart and keep trying. :-) When I was first beginning it sometimes took days (even weeks) to figure something out. But that is the learning process...... the more you hack and try, the more you learn and the better you will get. You did pick a particularly hard problem to start with. :-)

I'm kind of interested in how to do this myself, I may post a way to get it to work in a day or 2, but it may have different logic from your program. Good luck, and don't let it get you down.