[SOLVED] Creating custom items?

[DnALANGE]

Model editor -> open your .ent (model if it is a .ent) -> Settings -> TYPE = Item , SUBTYPE = Puzzle.
Now click on your item and you will see on the right side of the screen : general\Body\Attachment, that's for the body, { gravity etc } just open a new model editor and use for example an Original amnesia key item.
Hope this helps out.