The major steps that I took in removing trunk pieces and installing my Dynamat.  I bought a bulk pack of Dynamat (36 sq ft) for my 2007 Lexus ES350 to use in the trunk and the rear deck.  NOTE: Dynamat will NOT take all your rattles away as you can see, what it will do is reduce them greatly and increase the sound from your bass instead of it being lost through the trunk and rattling.  I highly recommend it for anyone with a subwoofer, my car rattles much less than it used to, especially in the interior, my side view mirrors even shake less just by what I did in the trunk.  Also, 36sq ft of dynamat was not enough for the WHOLE trunk but a good part of it, and it is true that if you double or triple layer it it will perform much better than a single layer.    I hope this video helps, ratings and comments are always appreciated!  Thanks everyone!