WOW!
This is exactly what I want to do to my T-Rex I'm currently working on... Could you link me to some tutorials on how you setup the muscle/skeleton rig? (If it's a book, please give the name. ;D)
Also, what resources did you use for the anatomy and shape of the Rex?
"The first rule in government spending: 'Why build one when you can have two at twice the price?'" - From the movie 'Contact'.