Honestly I don't see how you can do it with or without the prof nav.

So far only a BMW service centre can do an upgrade, I had mine upgarded recently & it took 5 hours, so I was told by my service advisor.

If it can be done @ home please tell, Im all open eyes & ears.

Thanks

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1988- M5 E28 Full South African Spec Antracite
2000- 740i E38 Fully Loaded Sorrent Blue
2004- 730d E65 Fully Loaded Titan Silver
2008- 750i E65 Fully Loaded Black
2005- 530d E60 Fully Loaded Deep Green
2009- 330d E90 Sport Pack Fully Loaded T/Silver
2009- X5 3.5d E70 Sport Pack Fully Loaded
Titan Silver