I would like to post some info about my experience with AUTOCOMPUTEREXCHANGE.COM, I sent my PCM as this thread (SKIM nightmare, 2001 GC) will show to have the SKIM removed and the towing package added, and also R&R if needed. I spent months trying to fix several electrical problems and at various times contacted ACE.com, which they would reply "there is no way our computer would be causing those issues." So after months of headaches, I sent my PCM back down to have it looked at under warranty, when they receive it they state they can no longer cover my PCM under warranty as it water damaged. They specifically state that "it looks as if you have drove the Jeep through a river" so they wont touch it. (The wettest my WJ has been is either rain or car wash!) When i get it back home the warranty stickers are broken so I decide to open it up and look inside. There are several traces that are burnt off the PCB and can reach the opposite side of the case and touch the metal (grounding out my data bus). This is the entire problem with my PCM, it was never a SKIM issue at all, and if they would have taken the time to fix my PCM as they should all of the issues would have been resolved on day one. But instead the screwed me over and ended up taking about $250 of my money, leaving me with a very ugly $250 paper weight.
Long story short I would never recommend anyone to send their PCM or anything else to AUTOCOMPUTEREXCHANGE.com!!!