Ok... I got a question for those who would know... We've got a 2004 Ford F-150 Heritage. It's the "old style" model (identical to '97-'03) they sold in 2004 alongside the current version of the F-150. Anyway, we've only got one key for the thing. My wife "bought" it used (with only like 5K miles on it). Long story short, it belonged to a family member who couldn't handle the payments so my wife took the truck and the payments and traded her existing vehicle for it. The problem is, she only got one key with the F-150. Soon after she got the truck, the keys got locked inside it. She went to the dealer with the VIN and they cut a "door only" key. She claims they told her they had to order a key at the cost of $150 if she wanted one that could actually start the truck. Now, as far as I can tell it is in fact a transponder key. Apparently, you can buy blanks online (eBay and elsewhere) and then have them cut. According to what I have found, if you already have 2 keys, you can program the new key yourself. Otherwise, you have to get the dealer or a locksmith with the capability to do it. It's a major hassle only having one key. I needed the truck tonight, and she has the keys for it in her purse at work even though she hasn't driven it for 4 days. I am putting an end to this nonsense. I'm going to the dealer tomorrow, and am going to see what they say. In the meantime, I'd appreciate any info I can get.