yup
No
NO
I believe you can, yes.
It depends if the Guitar Hero 3 songs were released as DLC on GH: World Tour. There is no way to directly import songs from Guitar Hero 3 onto World Tour.
Guitar hero World tour is called Guitar Hero World Tour because you go around the world in your concerts.
yes
No only guitar hero world tour P.S. you can only play the drums on guitar hero world tour
Guitar Hero World Tour and Guitar Hero Metallica
No you cannot
No you do not.
Yes, you can :) They work fine with Warriors of Rock, and with any other Guitar Hero game from World Tour onwards!