Hi, Ian!
The avatar is automatically generated according to your rank, tours and missions completed, etc. You should only go to "Control Panel / Options" and there to "Edit Profile" and in the cell "Avatar" to put the line "http://fly-euroharmony.com/pilots/badge/2383.png", press "Edit Profile" and from now on you shold see your badge next to your name and EHM Id.
Good luck!
EHM-1212 Dorin Florea