A quick search on Archiguide does wonders:
http://www.graphisoft.com/support/archicad/archiguide/alignview.html
I think the Align View command is 10% useful, 90% frustrating. The chances of matching up the model with the photo's angle & distortion, is almost impossible.
It's often much quicker to just eyeball it by putting the photo in as a background in the 3D window, moving the camera around using the 3D navigation controls, and placing the camera into the path. Once it's close you can use Photoshop's Edit>Transform commands to do the final tweaking. The Skew, Distort and Perspective methods work a treat.
Here's an image I did for a client who gave me a
very
distorted photo!
Cheers,
Link.