Add/change sort methods in video view

Hello,

I'd like to be able to sort my television shows by duration, e.g.:

• Doctor Who - 4:01:07
• My Little Pony - 6:00:38
• The Whitest Kids U' Know - 8:56:45
  

I've figured out that the sort options in the side-pane are dependent on the skin, since Confluence offers three options (year, episodes, and name) while another skin I tried only offered two. However, I don't speak XML and can't for the life of me figure out how to modify the skin to add this option or change one of the existing ones (I don't need the 'year' sort and would replace that if I had to). Can someone point me to the section of code I need to modify?

There is no sort by runtime available, but you could possibly use a smartplaylist to achieve it.

its not skin dependent its set in the c++ code of xbmc why other skins only show 2 is probably because they do some other fancy trick instead of using the proper button.