How do you play guitar hero metallica with just the Guitar controller?

Nathan Hill: How do you play guitar hero metallica with just the Guitar controller?
Okay, so i just got guitar hero on the PS3 and it comes with a guitar. But the game keeps asking for the microphone controller witch i dont have, and i just wanna play with the guitar controller. Its really pissing me off and i would be extremely grateful to anyone who knows what to do. Thanks very much.

Answers and Views:

Answer by Bryce
disconnect or turn off the normal controller because you use it to control the microphone (there are no buttons on it) so it thinks by having the sixaxis controller on that you want to use the mic

Answer by Craig
Use your guitar to select all the options. If you use the sixaxis controller, it thinks you want to play using a mic.

Answer by Martin
connect to your xbox with the guitar not the controller.
that works with xbox it should work as well with ps3 🙂