STEP ONE: make a brush. this will be the one your ladder will look like

STEP TWO:
copy the brush

STEP THREE:
select the texture karith/ladder in the karith texture section

FINAL STEP FOUR:
move the ladder texture onto the other brush. make them align PERFECTLY and make sure it dosent show texture overlap, like on the brush to the right.

Uploaded with
ImageShack.usif you want the ladder to be on only a certain part of the brush, use the clipper tool and cut out your ladder and use the clipped texture as the ladder