Had this done to mine on Saturday by Chris at John Seal. I cover that here http://www.vx220.org...11#entry1902915
Couple of pointers-
I bought the spurious Zafira stalk from Ebay. It doesn't contain the dip/full beam switch. As the cruise functionality is in the stalk itself, Chris built a hybrid VX/Zafira stalk that works.
The Op-com switch is in the VX220 menu (enable/disable cruise toggle?)
I supplied a Z20LET loom plug, which Chris removed the connectors from.
Other than that, it's as simple as four wires from stalk to ECU and add a live feed. Works perfectly. Three buttons, 'R' is 'reduce' or 'resume' depending upon whether cruise is engaged. The cruise disengages instantly when the clutch is touched (way before drive is interrupted). The speed build up on 'resume' appears controlled (i.e. the ECU doesn't apply full throttle to increase speed)
I've 1000 miles to cover in the next week. It'll be well used.