I'm kinda new to Linux Mint, I have it installed on both a Laptop and a Desktop. The desktop under Winblows is setup to bridge Internet from 1 network to another. I can't figure out how to do that under Linux Mint. Any help would be appreciated.

I guess that firestarter can do such things, no experience though.

I am going you are trying to share internet picked up over wifi to the wired network. nm is not capable of managing more than one wired/wireless at a time. (i.e. it can manage a wired and a wireless at the same time, but not 2 wired, or 2 wireless at the same time.) The following images show my configuration for sharing wifi picked up via PC card to the ethernet on my Powerbook.