So to do it you have to be a beta tester if already are then install null bossfight testing version then start the run and quit it then install 2.8.3 and boom your done it doesn't have the assets at all its just the normal school with no fun at all just do the installable one although this does have to do with the text change which is a secret text in the elevator was being hidden by SWA ooooo boring secret keep in mind the reason i said The Text Being Hidden is because in the null version it doesn't have the elevator thats why its hidden secret