The first and key thing to being able to dunk like Vince Carter is increasing your vertical jump.
Doing plyometrics is one of the best way of increasing your vertical jump since I read that it will strengthen your leg muscles and help you jump higher. I am seeing a good result with my jump. I’ve learned while doing this program is to first do stretching and other warm ups to avoid muscle cramps or any injury that may delay you on seeing good results. Try to check this site also to get your free jumping manual.
If you want to dunk like Vince Carter then you need to perform resistance strength exercises, explosive strength exercises, and reactive strength exercises.