I have ran into a problem I don't knwo how to address with the bathroom in my basement. When and whome ever installed it they used 1x4's for the wall studs aginst the concrete block. What I would like to do is replace them with at least a 2x, but I can't because of the shower/tub. It sits flush with the 1x4's, and to move it out an inch would mean busting up the poured concrete floor just to move the drain. Plus moving the wall of the closet at the other end of the tub. I have been unable to find any drywall screws less than an inch long to use. Less than an inch because the drywall is 1/2" and the 1x4 is less than 1" thick (right?). Before they used nails. Should I go back to the nails, or is there another way of attaching it. Are there shorter screws out there and I just haven't found them yet?