Thanks for this great NAV tweak software ! I've also created a custom colour. A nice "i-drive like" greenish colour scheme. The problem I have is that the NAV wont take the upgrade since my NAV is already running the latest version.

I'm reluctant to go back a version and then load my modified version as this will switch my USA NAV coded MKIV back to the Euro mode. It causes issues with BMW Assist when I do that. Is there anyway to get round this, and force the MKIV to load the modified V27.1 onto a existing V27.1 ?

Thanks, Adrian