Pah, if I had it installed... But I only keep Atlantis and Machine installed - they're the only two worth being named "an Indy adventure", anyway.
It only involved editing the level files and removing certain strings from them, that I remember. This caused those entities to disappear, so you could complete von Beck while walking slowly, slide down that underground shaft without worrying about obstacles, and so on... I believe that's all I ever tried in that game. Some did plan to mod/edit/expand it a while ago, but the projects probably stopped.