My 5-star dealer had never programmed a crossfire key before. I stood there for 30 minutes while they asked around, looked at my owners manual, etc ("we need the code for your car"). I flipped around the computer they had at the service desk, pulled up this forum, and in 5 minutes solved the problem using the method described by huudoo above. But again, my key was turning the lock before we started any of this. Thankfully, the dealer bookmarked crossfireforum.org for nex time.