TheM@x - I was indicating as above that its been done with CD changer emulation so the steps discussed relating to NAV emulation should be relatively not too complex as the IBUS network command language has been well documented.

Personally I just purchased an ASUS Atom PC with an SSD. Works great and it is fast. On the same note purchased a mini PCI-E CF card holder device and that also works well.

I have been using a carpc now in the E83 running XP on an Atom. The newest modification to this PC (just recently installed it) is a bootable CF card for a Linux OS on it. It does work well.

The MK4 on an SSD would be less moving parts and less that could go wrong.

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E83 - Aero PKG Mods installed: Homelink mirror. CIS-IBUS video module, AUX, Rr Dr Release, stock wheels, Remote start, CarPC (Atom) & mud flaps - NAV - MKIV - NA Map DVD - 2011
E46 - 18.5 wheels/tires (summer), 17 stock (winter), Homelink, NAV software upgrade, BMW video module, Radio to V53, AUX, USB IBUS interface,BMW alarm install, CarPC(Epia), remote starter, tank battery & angel eyes. NAV - MKIII - NA Map CD - High Version 2008.1