I am on 1920x1080 60Hz at the moment.
My full command line is posted in the OP. Just a couple flags for graphics options and custom lighting settings.
As for the icons being scaled, I have noticed some icons maybe be scaled a bit differently, if you look closely, there is an icon for a science cruiser (the Plato) overlapped with one of the hostile fighter icons, but it's fairly tiny by comparison. I popped into FS2 with the 2014 MVPs for a check and saw much the same thing, huge fighter icons with smaller cargo and sentry icons (second mission I think).
At any rate even the small icons are a bit jaggy, and as I mentioned before, I'd appreciate the ability to have a larger orb radar which may mean larger icons as well. I like my orb radar too much to drop it because of some horrible scaling. As I mentioned, if there's a way for me to redo the icons themselves, I'll do it, and I'll even share.
Also I did find that RadarIcons.vp and opened it up. I am kind of confused by the format being used. are the .dds file direct draw surface files? Why are you using those? I thought that was for textures or something. Everything else in the interface uses the Interplay/Volition .ani format as far as I am aware.
Maybe I am missing something since I am not a code monkey