I don't have a save, but I do have cheats:
First, edit your ResidualVM config-file (location is found in Readme, depending on your Operating System), adding the following under the [grim-win] entry:
game_devel_mode=true
Then start the game, and jump between scenes with the "j"-key, your target is "rip", but we need to get the fire extinguisher first, so jump to "tc" grab it, then jump to "rip". That should put you in a playable state at the start of the petrified forrest.