I've got new ACC carpet with the mass backing. It's got some pretty heavy duty creases from where it was folded in the shipping box and they don't want to come out. I've had the carpet laid out for the past two weeks. I'd like to apply a little heat to the backside of the carpet to soften everything up, but the carpet pad which is glued to the underside (against the mass backing) is doing its job and preventing any heat from reaching the carpet. I'm considering removing the insulation from the carpet with a razor blade and gluing it to the floor of the car instead. Has anyone else had to resort to this? It's an enormous undertaking.