How can we create a living dinosaur using DNA technology?
It is widely accepted that birds are in fact dinosaurs. Cladistically speaking, no DNA technology is required to create a living dinosaur, as they already exist. 

Assuming you want to do the same to a non-avian dinosaur (a paraphyletic group), however, a better idea would be to ask on World Building SE, as there have been little to no scientific research on the topic, and speculative answers are generally considered off topic here.