I find myself with a GOOD problem. I was contacted by a large, national company who runs a chain of truck stops in the U.S. They like my PumpCodes app I wrote. It looks up fuel dispenser error codes and tells you what they mean. Really a simple app. They want to purchase an Enterprise License of my app. Something close to 1500 copies! I have never done any kind of license verification in an app. Any ideas where I can start? They want to be able to load devices in their home office and deploy to their stores. Can this be done without screwing myself?