Well my bad.. that worked.. I had tried it once but, with a Win-disc copy probably not cracked as I have ISO for win launch. so it was erroring..
that worked with my steam version.
Actually it was erroring because it seems Steam does some other parameters for launching SP/MP that makes the code not work if it's a "non-steam" game. Tested with Steam jkja install.
I was hoping to launch the mod separate from base Steam version, the copy I had separate was the Steam version afterall.