With EFILive NOT running, change the registry settings as follows:

To change the Spark map, change the registry key:
HKEY_CURRENT_USER\Software\Starr Performance\EFILive V5\Spark\Value
from SAE.J1979.SPARK ADV
to <the PID name of your choice>
for example: Spark Knock Retard would be: GM.LS1.KNOCK

To change the Fuel map, change the registry key:
HKEY_CURRENT_USER\Software\Starr Performance\EFILive V5\Fuel\Value
from GM.LS1.AFR
to <the PID name of your choice>
for example: fuel trim cell number would be: GM.LS1.LONG TERM FT CELL

The title on the maps will still say "Spark advance" and "AFR" but they will log the PID specified in those registry keys.

Regards
Paul