Steve, have you got a LM-1 or LC-1 Innovate unit?

The format for the LM-1 is readily available on Innovates website and to be honest doesn't look that complicated to read. If one could program that is.
I guess a simple start would be to init the display and forward the values read from the serial port to the display before getting clever and drawing graphics as Jag did previously.

How's your C ?