EMMM! It doesn't allow you to unload/remove the custom object once you load it in the slot (No checkbox/right click option). Not even if I rename the original file to force max after a restart to look for it does it say missing file. Crazy!
Unless I find a registry item for it or find a way through maxscript then I dunno. Will look more about this tomorrow.
(http://9lols.net/wp-content/uploads/2013/03/Sleep-is-like-teleport.jpg)