This is a Project 1999 inventory mod with open bag slots. Remember that with this mod:
1) It will always show 10 slots, even if your bag size is only 4, 6 or 8.
2) If you put someonething in a slot your bag doesn't have (ie slot 9 with an 8 slot bag) then be prepaired to loose said item.
3) Bag contents will stay showing the old position until you replace a bag. For example, if you move bag slot 8 to 4, it will still show contents in 8 until you place the bag down. Also if you place a non bag item (ie Jboots) where a bag was, the contents of said bag will still show.
I didn't add extra bags in front of the open slots as I feel it is unnecessary. I just want to say that until they added the updated bag slot code this was always an issue (unless you had 8 10-slot bags).