Thanks all for feedback. Looks like I'll need to pay a visit to a specialist - i have no intention of installing a band expander as they are crap. I had noted a post from Jochen stating that the radio can be converted following a few steps, however this is possibly not for an E61?? I'll check out the phone/bluetooth (I haven't picked up the car yet, just preempting projects - my wife doesn't understand!!).
The idrive unit has 2 buttons so must be a CCC - sounds like I am in for some serious $$$$ to rectify the satnav problem. The car yard people reckoned the complete idrive can be converted to NZ for around $1,500 - $2,000 - does this sound realistic?
Cheers