In case, I chose the two churchs in Coogee. And since one of the church was with tower, it might be hard to create the whole facade by my camera. So I used this church to practice. And I selected 5 points front of the main facade and take 3 photos on each point. And the result of photosynth was perfect, 100%. (http://photosynth.net/view.aspx?cid=46d91732-f075-4532-acb9-74a1cbba9a26) You could see a nice 3-D facade of this church.
And use the same method, I finished my first step.(Photosynth)