showing dekstop items in xfce4
 

How can I show the files in /Desktop on my desktop in xfce4?

You can't - well, Xfce4 currently does not have the capability to show items on the desktop natively. You can probably use something like Rox to draw the desktop, but I have always found that to be problematic. The new version of Xfce4 is supposed to have desktop icons, but I don't know when it will be out.