hopefully yes:
the mentioned rdf is the prescription (receipe, command, order) for k-m how to handle the mime types (mentioend in the rdf).
if not:
You will find an a single command adapeted to my system and commented as best as I could here at the bottom:
http://kmeleonbrowser.org/forum/read.php?f=1&i=14542&t=14474
even if my explanation is not very understandable
I found what the commands do by comparing.
If You need to adapt the rdf Micah located to Your system - compare with mine:
the example adapts one command to my system.