[jinxdone]

Sorry to dig up such an old post, but I was looking how to do this earlier today and this thread is the first match on google, so i'll post instructions how to do this here..

Add the following in your .xbmc/userdata/keymaps/keyboard.xml;

Code:

<keymap>
  <global>
    <mouse>
      <leftclick>ContextMenu</leftclick>
      <rightclick>Select</rightclick>
    </mouse>
  </global>
</keymap>