Can't set Shotwell Viewer as default

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http://forums.fedoraforum.org – This is a rather baffling problem. Running Fedora 16 LXDE spin on my netbook. I removed the default (gpicview?) image viewer because I preferred Shotwell. Now my problem is that I cannot find a way to set Shotwell Viewer as the default image viewing application. For PNG's it automatically opens the viewer, but JPG's open the Shotwell photo manager. Shotwell Viewer is not on the LXDE menu when I go to set program defaults, and I can't find the CLI command for it. Anyone have an idea? (HowTos)