Hey Thom,
As you know, the incredible thing is that the Dorje Shugden temple was ordered and sponsored built by the 5th Dalai Lama HIMSELF and so was the main image of Dorje Shugden within to commemorate the death of Tulku Trakpa Gyeltsen!!
It is also located within a prominent area of Lhasa right behind the Central Cathedral of Jowo Buddha near the bakhor!!
A testimony to the acceptance of the greatness of Dorje Shugden from the time of the 5th Dalai Lama!!
P.S. on the home page, webmaster includes a map of how to get to Trode Khangsar (Shugden Chapel) in Lhasa. Also webmaster includes a book that talks about the significance/protection this chapel has received that we can buy off Amazon. Just print out this map and anyone going to Lhasa can find it!!