I think you can add the trash bin by making a file *in a text editor* with the following:
Code:
[Desktop Entry]
Comment=Contains removed files
EmptyIcon=trashcan_empty
Encoding=UTF-8
Icon=trashcan_full
Name=Trash
Type=Link
URL=trash:/
And saving it as trash.desktop.
I'm not possitive of this, but I believe that's how to do it.