How to Play With Two Players on Guitar Hero World Tour for Wii

Choose the instruments you each will be playing. You can have any combination of instruments in the band.

Insert the Wii remotes into the instruments. On the instrument, there is an open spot in the shape of the Wii remote that it gets inserted and plugged into.

Insert the disc into the Wii. Inserting the disc will cause the Wii to power on.

Power the controllers. The game will recognize that two controllers are on and automatically enable multiplayer.

Choose what game mode you want to play. Quickplay and career mode are two of the options. Again, the game will recognize that there are two players, and you will be able to choose two characters and the two different instruments after choosing a mode.

Start playing. After choosing characters, instruments and difficulty (you each can choose different levels of difficulty), start playing the game by choosing your first song.