Haltech Cruise Control

Has anyone had any experience with getting a cruise control input wired up and configured with a Haltech Elite?

From what I can work out, one wire gets connected to a 5v source and the other gets connected to an AVI input then as each function of the switch is used it goes through a different resistor and returns a different voltage which is then mapped to a different function.

Does this sound correct or am I better off using an SPI instead?

I haven't set up cruise control on the Haltech myself but there's a thread on thje Haltech forum covering it here: [url=https://forums.haltech.com/viewtopic.php?f=30&t=12719&start=15]https://forums.haltech.com/viewtopic.php?f=30&t=12719&start=15

Skip to the bottom of page 2 where the feature actually got released.