Finally someone with eh same question.
I have iGo 8.3 running on my HTC Kaiser and i easily copy maps for places i travel to (Egypt, Qatar, Dubai and USA).
Knowing that all AVICs run on iGO too made me wonder how easy it was to drop maps. I will be installing the unit in my 2009 Subaru Impreza in Egypt.
Knowing that it is possible, i might get me an AVIC-X910BT!!
Thanks again..