Cant think of the name of this movie!!?

Well its an old cheesy kind of movie made in late 90s, its a movie I watched as a kid, its about these kids parents leave and they have a party, then they start driving and they doze off and wake up in the 1800s, and its like a wild wild west kind of town and everybody there is a ghost or dead and they spit out green slime, and the whole movie is these kids trying to get there way out of this town. Remember this movie wasnt a huge box office kind of movie, its like a cheep one.