I've just downloaded this overlay. I recall Baltit being on the left side of the river, looking north, not the right side. The supplied text has some inaccuracies. The Hunzukuts are Ismaili while the folk of Nagar are Shia. It's said the Hunzukuts were converted by an Ismaili missionary from Badakshan (Afghanistan).

It's worth noting that the Wakhan corridor, the rightmost finger of northern Afghanistan pointing in the general direction of China, was the creation of Colonel Algernon Durand when he was responsible for the Gilgit Agency in the 1890s, and this border is called the Durand Line. His memoir of five years in NWFP is a fascinating read.

Google Earth's resolution is insufficient in this region to show the 14th century palace fortress of Hunza. If anyone has its location, it would be a welcome addition.

Salutations, Adrian