The definition files allow ECUFlash to view the parameters on the hex file or ROM. Without the definition file for the ROM you are trying to view, you won't be able to modify it.
You download the
rommetadata.zip file I posted and copy the contents to
C:\Program Files\OpenECU\EcuFlash\rommetadata\mitsubishi\ecli pse or wherever you have your ECUFlash software installed.
I posted plenty of ROMS in the first post. Download
Mitsubishi ROMS.zip