On a related subject, I suppose it is well-known that you can change the splash-screen?
The file is in the X3 installation folder called Splash.dib. Make a backup and change the file to what you like.
If you can't edit it, rename Splash.dib to Splash.bmp; edit the BMP; and then rename it back to Splash.dib.
DIB is another form of BMP.