Don't take offense, but it's kinda hard to make out what you are trying to say when you don't use periods.
In my experience there were no point in the quest where you were hit with a baton. Only taking the gas and the bullet through the hands. Whatever. The cutscene after killing the townspeople where you end up being hurt by Marco can be forced with console commands, as I'd think you tried. It should lead to another cutscene where you are buried alive, followed by you waking up in a shack. If you forced yourself forward to that point using console commands I see no reason you cannot finish the mod.
Could you specify why you can't kill Marco? Can't you get to the cemetery or what?