Thanks so much for this information, as a new VFR devotee that only came with one key I was nervous that I would lose it, and be up for an expensive lesson. I bought a key from EBay, had it cut locally, made up the lead and successfully programmed the new key this weekend. The following YouTube video was also helpful.
https://youtu.be/db0ee6u7CjQ
I am happy to lend my lead to anyone, I'm in Tauranga, NZ, and can post it, or if anyone just wants a resistor I have a spare. Feeling a lot more relaxed now about the key situation.