obd-2.com sent me this email reply in reponse to my questions:
Q: Do you have any info that would help me be able to do datalogging with my EMPEG / Rio Car on my OBDII 1998 Mitsubishi Eclipse?

Re: Will use ISO protocol, do have a smart client chip system, that simplfies message format, would then need a coverter device for input to the Rio.
www.obd-2.com/chip.htm

The above link shows some kind of simple DOS program that utilizes their product. Any input on how you might impliment it into the Empeg via the Serial Port?