You have the dash frame out? Putting in that jute with the dash installed will not be easy as it glues to the bottom of the cowl area. I did not buy mine from REM, but from DMT, but should be cut to shape already. Wear a dust mask as that stuff is annoying to work with as you try to glue in place.
The fiberglass/cardboard pads should line up on the firewall, cardboard side facing out. If I recall the only tight spot is around the column brackets.