locating holes in backerboard

[Charles Spitzer]

tape measure. no. use thinset.

[kato]

I am tearing down the walls around my bathtub because of water damage to the drywall underneath the tiles. I am installing backerboard (Dura-rock) all around and then re-tiling. My question is, what is the easiest and best way to locate the holes in the backerboard for the 2 faucets, 1 spout, 1 diverter and one showerhead? Also can I use ordinary drywall mud on the new seams of the backerboard?

Thanks.

[Punch]

cut the board to size, then use lipstick on the pipes, press board against pipes