Now i have looked into both MyMenu and Catorise, and the only thing these programs does is to update a (freedesktop standard) menufile in /etc/xdg/menus.
-That was a big dissapointment...

Anyone famiiar enough with the freedesktop definition of menus to fool it to run an atribituary program?

Or knows where in the hildon-desktop source the call is and how to replace that with something else?

Otherwise i guess we have to be very persuasive and try to convince the cssu-team to drop their portrait mode development for a couple of minutes, to redefine that call