I have grown very comfortable to my Colemak keyboard layout (my typing speed has doubled since I started using it). My only problem with it is that there is no caps lock key because under this layout because the caps lock key is a second backspace key. I really miss caps lock so I would like to change the backspace key on the top right corner of my keyboard (not the one right next to the "a") into a caps lock key. Is there a way to do this using xmodmap or some other tool? I am using Xfce.