[Banshee-List] Command for Preferred apps

[Chuck <stephench westnet com au>]

I know this is a n00b query, but if the cap fits....

I'm trying to sort the "preferred application" settings so that Banshee 
talks to a URL. ATM, it's locked on Totem.
I don't understand the format of the command to make it happen. I've 
Googled assiduously, but the results don't seem to relate to my specific 
question (or they haven't worked!!), and copious experimentation has 
been unsuccessful.

Using Ubuntu Hardy, Banshee 0.99.3

I love the way it handles my disk collection, and I'm keen to use it for 
interweb radio/podcasts.
TIA