Glue residue removal.
Take the bonnet from the car, turn it over on a table with a blanket on it, use terpentine or glue remover.
It sounds like a lot of work, but your engine and your back will be gratefull.
Do not use a metal scraper, you will scratch the paint and getting rusting in progress.
Soak a cloth and rub it down and use the plastic scraper you use to aply decalss and so on.
Make sure all is clean and dry before putting the nes lining on.
Sticking instruction sound proofing MKI & MKII
It is just peel of and stick in, no extra's needed.
Place the soundproofing in its place, each can go only in one place.
Make a nice and even fit all around, hold down half with one hand, lift up a corner, peel off the backing as far as possible, fold it underneath a bit and gently let the soundproofing fold back gently, then press in place, lift up the non stuck rest, peel of the remaining backing and gently place the rest of the soundproofing, do not pull to much because it will get out of shape.
Remember that it sticks like He.. and is almost impossible to remove and stick back on again.
Have you found the little pieces in the box ?, try to stick these and remove again, any problems just ask.
Good luck, Joost