Softtouch walls get kinda spendy, it takes TONS of 3M spay glue and staples to do a soft touch wall a10 yard of vinyl and foam doesn't cover much, but really adds to the finish. You spray both the wall then the foam, after a minute or so you stick the foam to the wall. then repeat with the vinyl so it takes a bunch of glue. figure a big can of 3M for every 4x4 square area. Lots of ventilation too! Staple all the edges every half inch then cover with wood trim.
Good luck, take pictures and post progress.
2001 GMC 6500 Topkick, 22' box, dropped frame, designed to fit into a 9' garage door. 3126 CAT 6spd Man Lo-Pro 19.5's w/ 3.07 rear axle ratio