First off, very sorry to hear of your marrage problems
It must be a very hard time for you.
Regarding the car, you have to change the car IKU as well as far as I know, as well as codes in 3? different places. You need a brand new speedo and tacho, and IKU unit at the least.
Might be worth talking to the Irish guys about it as they've just changed from MPH to KMPH if I recall correctly and they're changing their speedos.
