If you're talking about weird blocks replacing your inventory skin, I think this is what you're looking for:
Code:
<Mapping ArtAssetID="inv_empty_slot" FileName="inv_empty_slot.tga"></Mapping>
You can just crop out one slot from the "inv_backpack_slots.tga" and save it as "inv_empty_slot.tga"
The draggy bars are:
Code:
<Mapping ArtAssetID="panel_oneWayResize_horiz_icon" FileName="panel_oneWayResize_horiz_icon.tga"></Mapping>
<Mapping ArtAssetID="panel_oneWayResize_vert_icon" FileName="panel_oneWayResize_vert_icon.tga"></Mapping>