Thanks ccfj1 - I've been lurking for a while now, and have used your instructions to make several changes to my mk4 nav. I have run into a slight issue though after adding the camera alert on/off function. I copied and renamed the language files as suggested, and when turning the POI alert off, the menu's and voice all remain in English, however the TMC messages and a couple of other items (such as the message to activate bluetooth when I go into the Telephone option without having a phone with me) appear in French.

It's not a major issue, just more a little niggle that I'd like to fix if at all possible. I guess I must have missed something when copying the language files, but can't seem to find what. Would you have any ideas?

Thanks again for all your help so far, your instructions on various threads have helped me immensely.