what i have done in the past is strip the interior out for example seat(s) and trim along the doors, remove old carpet and clean the floor up as best as you can get it,let the cappet sit in the sun for a hour so so like metioned above, then lay your sound deadnore and your heat sheld in center it up the best you can trimming the extra around the edges, then lay your carpet on top of it center it up the best you can, then you go under the truck with help from the wife or kids inside of it and use like a punch or screw driver and put it up throught where the seats and seat belts mount to find your holes you need to cut out then just mount everything back into your truck and your done it will take just about hour and a half for your frist time.