liquidsnakehpks: If you cant even boot into the game forget about switching to the classic mode.
This is true.
However, and this at the moment is pure speculation and nothing more, residualVM *could* potentially support running this version of Grim Fandango (minus the remastered additions), because the files in the main folder seem to have been kept from the original engine (the remastered edition is built on top or around that). Maybe it will eventually be possible to run the classic game with residualVM sort of like you can run the classic game with scummVM for the steam versions of the LucasArts games (including the monkey island special editions - were some extra work is needed from the user).