i hope you bought the steam a seam lite ...the other stuff is a no-sew fusable and is very very stiff and about impossible to get a needle though and it will gum up the needle if you do manage to sew it.
it is good to 'window' the fusable that way you have alot less stiffness...windowing means you copy your shapes onto the paper backed fusable, then before fusing it to your fabric you cut the inside out...leaving between 1/4" & 1/2" to fuse onto the fabric. (visit fon's and porters web site they have a tutorial showing how to do this...i think Sewing with Nancy also has a tutorial on it.