I defer to your superior knowledge with these matters makkan. I only have a basic understanding of these things.
As far as the update is concerned, my car is in at the stealers at the moment and has been for over three weeks. As you can imagine I'm on fairly easy terms with my service contact. I did mention this when I got my daily report yesterday and I pulled his leg about whether the update actually existed and commended him on his adherence to the company line. I'll try and get some more info out of him today.