I have the same problem, cant find digitizer, dealer is not good solution but its all we can find for now, they will replace your display too no mather is workin good or not... So it will cost you more.
Its worth the money, but wp8 is not better at all from other wp....
there are 2 solutions.... 1. ms enable to move apps to sd. 2. someone makes android for this phone....
we need to wait :(