You can downlaod the install guide at:
http://www.powercommander.com/downlo...eng802-311.pdf
USB to 9 pin serial adpaters may or maynot work. One of the reasons we made the switch to USB was because of issues with serial and USB/Serial adapters. You can try one, but if you have issues there is not much we can do to assist you with it.
As far as a map goes, the SERG was a pretty limited production unit at the time. We never had one in to do map development on. Ideally you should take it to a good tuning shop to get it mapped properly