07 dodge charger

It's in the manual. But basically you insert key 1 that is already programmed and you turn it but don't start the car. Then wait til you hear a beep or the red light starts to blink in the dash. Then take it out and do the same with the 2nd key. You will hear another beep. Then put in the new key you want programmed and do the same and you will hear the beep when it is programmed. It's something along those lines but literally takes 1 minute to do maybe 2 if it's your first time. But the Dealer won't admit that this is possible but check your car's manual and you'll see it.When I called the dealer for the key they said I had to take it in. I said but I have 2 keys already programmed can't I program it myself. He said no. You need the code and a computer with the software to do it. I said so why does it say in the manual that I can do it myself as long as I have 2 keys that already programmed. He said oh I didn't know. Then told me the price of the blank key which was about $170 just for a blank key unprogrammed.