projection mapping?

i saw this http://www.youtube.com/watch?v=AgA_ymkPf1o&NR=1
and it looks vary realistic.
how to do this in blender?
sry for my bad info:o

There’s a camera mapping tutorial on Blender Guru showing how to do this:
http://www.blenderguru.com/camera-mapping/

thx
this is what i was looking for