Time to exercise my inner geek. Although he's obviously not hiding very well.
Anywho, I present to thee the TARDIS moon, which will obviously replace the original Moon texture. For those of you who don't know (and I'm sure there are a few) TARDIS stands for Time And Relative Dimension In Space and it is the time machine of the Time Lord known as The Doctor, from the long-running BBC television series Doctor Who. And why, you ask, is it shaped like a Police Box? It's broken, that's why.
No, the light does not flash. If anyone knows how to make this happen then do so, as long as you let me know so that I can nick a copy. ;)
Installation: Same as any other texture, place the .dds file in the archive into the dropzone folder in your Just Cause 2 directory and viola!
P.S Also, I find that this texture actually looks best at dawn, as you can see from the screenshots.