Yes. In the options, there should be an sfx volume option. Turn it down and you won't hear the crowd, but you won't hear any of the star power effects, but who's going to miss that?
turn it on
There is a power switch on the guitar
hold the button with the x on it until it starts to blink and its on.
Its quite simple turn the PS3 and sync it with the PS3 and then its connected with the PS3
you turn of the console
Yes
That is impossible in the PS3 version. For the Xbox 360 you merely turn on the guitar.
First turn the guitar on and then connect it to the wireless receiver
If the controllers are for the same system then just plug it in or turn it on and play.
Yes, the guitar controller form Guitar Hero 3 is compatible with Guitar Hero 4 (World Tour). Just turn on the wii-mote in the guitar controller and it should recognize it in the game. Keep in mind that only one player can be the guitarist and the other has to play the bass guitar. Hope this helps... have fun and ROCK ON!!!
sync them and then sign in when they turn on
It Depends what guitar you have. If it is wireless then plug the receiver into the slot in the PS2 where you would normally plug in your games controller. If it is not wireless I would guess that you plug it into the USB cable place. The will turn on when you turn the PS2 on. (to turn on the guitar, press the START button)