Congrats on ur new ride!
Roads to Shandur are possible on any vehicle, 4X4 is not necessarily required if you are coming from Gilgit side, having said that, the locals take their NCP corrolla's from chitral too.
Coming from Gilgit, its metalled road till phander, after which its off-road track but farely flattened by frequent travelling.
We went there last year for our summer camp, I think there were 9 different vehicles (all varieties)
Links to the threads if you are interested are....
Islamabad Jeep Club • View topic - IJC Summer Camp 2010