I found an online, detailed map of Bishkek with all the streets labeled! It is in Russian, but that will do nicely.
We tried to get the orphanage by minibus today. We were very close to the right street, but since I have always gone to the orphange from the north instead of south, I didn't have any landmarks to tell me where we should get off. We were told by two people that the street we were looking for was the wrong direction and I was beginning to think I was crazy. But I have been vindicated by the map and I can go to the orphange tomorrow by minibus instead of a taxi.
I am so pleased.