Hi Exopar
Your thread heading "ABS retrofit" and the detail of your question are a little confusing.
"ABS retrofit" would mean that you are adding ABS to a bike that, when manufactured, did not have ABS and no ABS would be 'configured'
What you are actually wanting to know if whether the coding can be changed to see another foreign ABS module on a bike with existing ABS.
Be that as it may, unfortunately the answer to your question is 'No'. That can only be done by BMW, and unfortunately that can also only be done on certain bikes. They have apparently recently changed their system so that it does not allow them to 're-code' bikes with ABS modules that are already configured in another bike. ie. according to their system the ABS module number "XYZ123" is configured to work in bike "ABC987", so it cannot at the same time be configure to work in another bike. This is according to the local BMW Motorrad tech and how true it is I do not know, but I have recently, on 3 different occasions with 3 different bikes, attempted to get ABS modules re-coded by BMW. They have failed on all 3 counts. Basically they are forcing you to buy a new ABS module which hasn't previously been fitted to another bike.