I changed Desktop Recycle Bin default icons to custom ones. One for empty and one for full. But the problem is that the icons dont switch by themselves. I have to manually refresh desktop for icons to change (full/empty).
I found the answer. I will post it here for others with same problem to see it. :) You can do this by changing some values in registry. (Adding ,0 to the end of the .ico link)
You can read everything here: http://www.sevenforums.com/tutorials/24761-recycle-bin-fix-custom-icons-not-refreshing.html