The area of the basement where I am building my home theater has uneven floor joists. I am concerned that when I drywall I will have a wavy ceiling. Does anyone know a good way to fix the floor joists so that the drywall can be evenly installed? I've thought about scabbing 2x4's but don't know how difficult this would be. I've also thought about using resilent channel, and shimming it under the joists that need it...I've never done this before so I don't know how practical or how well it would work. Does anyone have any experience with this or any alternate suggestions? Any help would be GREATLY appreciated. P.S. There are pics of my basement at the bottom of this post. Copy and paste to see them. Thanks, Dan M.