Hey, thanks a lot for your input. I will definitely give it a shot. I'm always up for open source stuff
The only other option would be to leave the computer on the DMZ so the ports are open, then use a software firewall on your computer to protect it. Then you can open the ports you need in the firewall, and it would protect the rest. It would be as good of protection as a router in the middle. I use Norton Internet Security, but as your strapped for cash, who hasn't been, Zone Alarm is great and free.