Aren't you underweight now?.....
Have fun peeling up fatmat, that job sux.
Replace dynaliner with UnderCarpet lite from DEI.
http://www.designengineering.com///c...er-carpet-lite
Lays down better, a lot better. 3M super77 or your favorite spray adhesive works great. I feel it works better but I have no science for that. The Dynaliner will collapse under your feet ad you will end up with a crater where you heel goes.
The jute may have some R value but it is not nearly as efficient as the UC Lite.
The trunk is a big drum, it will still resonate without any dampening material. I only do it if the car is getting upholstered back there, all the ____mat products have a nasty habit of getting all over your stuff if they are not covered up.