Ok all jokes aside, if you want to do it do it. It will never be a TRUE nismo but it's your car and no one will fault you for doing it. Just don't walk around telling people and claiming you have a nismo. Then you won't be a douche, just a guy that really likes the nismo look, but didn't have the cash at the time to get a real nismo.

I was told that if you have Tony sign your dash in smurf pen or whatever your car would be more special than a NISMO.

This is very true.