How to edit "Open With" context menu?

[michael singer <mail a-visual-notebook at>]

Hi all,
sorry if this is a silly question, but i'm new to f-spot, and i couldn't 
find an answer elsewhere...
I'm running f-spot 0.4.4 on openSUSE 11.0 / Gnome.  All i want is  to 
open images from the browser view of f-spot with an application of my 
choice.
I'm wondering how to define applications that would show up in the 
context menu?
At the moment, the "open with" dialog (right-click, context menu) says: 
"no applications available".

Any help would be very much appreciated!

Cheers,
Michael