It was the 'toss the old carpet padding in the trunk mod'. We bought some pad, and since Jseabert'* was in better shape, we used his as a pattern for both. Got the carpet cleaned up too. Just put it together. Looks awesome, and the velcro on the CD changer holds to the carpet really tight.
Funny though, his trunk had 3 retainers for the pad, mine had only one. The other two were never there.