Those asking about background pictures in my User Viewer.
I use it all the time with my own background.
Take a screenshot or picture you want and resize it to 2560 x 1600 save it as a jpg and name it splash.
In your graphics folder were your skins are look for the textures folder.
Create a new one in the texture folder and name it userviewer.
Put your new picture you named splash in userviewer folder. That's it.
Full path would be C:\Program Files\Rise of Flight\data\graphics\textures\userviewer.
Sample: