Coding new keys for an immobiliser equipped bike

I’ve just bought a Suzuki spare key from an official dealer for my immobiliser equipped K5 1000.

The key is chipped, but needs to be programmed to provide the correct code to the bikes ECU so it can be used to start the bike.

I have one other existing working key.

The dealer said that I could code the key myself using my existing key and the bike, and that it says how to do it in the service manual.

I believed them because you can do this on the R1, but there’s nothing in the Suzuki service manual that says how to code keys…It just talks about how the immobiliser works.

So how do I program the new key…Any ideas?