TWisted NEck

[2lim]

Okay my firend has a pawn shop guiatr he got a little whileback. He was trying to fix the action on his guitar by using the truss rod to take some of the bow out of the neck, however when he did that, the necj twisted, and when he put the roid back to normal it is was still a little bit twisted towards the bass side. Is there a way that this twist couldbe removbed without taking it in to a guitar shop, and what approx will it cost if we do take it to a shop?