There is no feature for programming these keys: no RFI, no electronics, just a key. The cover unlock is common to all. I do not know the difference between the round and the oval. The dealer might. The REALLY BIG thing is the tag with the key ID number on it to get what you need to match exactly. I would get a blank key from the dealer with the round mark and the cover unlock plug and get it copied at your nearest Ace hardware store (or locksmith or anyone who can copy a key without destroying either sample or blank).
Karl