Added Nov 29, 2012
Hand baste the muslin strips into the hem, matching the edge with the mark you made 1" from where you want the hem. This will make the centre mark on the muslin line up with there you want the hem to fold.
Baste just inside the hem allowance, right next to the mark down the centre of the muslin strip. Just catch a few threads of your fashion fabric with each stitch, since you won't be removing these stitches.