Did a little modifications to my splash screens for DCS, I also attached a rar file if you want to use them.
They all go in the MAIN DCS world folder, not the user section
DCS World>Mods>aircrafts>(select A10C/BS2/P51D)>skins>1>ME
Sounds complicated but isn't, rename the original, I always just add "org" to the end of the extension then paste these in the correct folder.
The rar contains the correct folder path to make it really simple, just drill down until you find the "base-menu-window.png" file