If you want to stick the mouldings back on all you need to do is remove the metal backing (you can never get that straight once you take them off) using a hot air gun or similar and stick them on wit some double sided trim tape.

As long as you are careful about the length (the strips can be 'adjusted' whilst warm) and use a wooden batton as guide to keep you striagt and level you'll never tell the differance froma rather expensive new set.

HTH.
Iain.