[Lejo]

I have exactly the same question as Henky Penky. I found out how to change the Main Menu screen for instance. But how can I replace the initial loading screen? I resized an image to 512x512 and saved as TGA and put it in the corresponding Files\Gui folder and added the two lines in the filelist.txt as instructed by fly_zo but nothing happens. I've read about a background0.mat but where can I find it? Or where can I find the initial loadings screen so I can replace it by my own one.
Hopefully somebody can help me out with this.