How to edit the loadingscreen of a map?

Hey,

I've got a mod, but I need to edit the loadingscreen of if.
Could someone please help me with it?!

Already thnx from me!!

Hopefully this helps: http://modsonline.com/Tutorials-read-319.html

for german guys this is a nice tutorial too: https://www.youtube.com/watch?v=knDjBEWvNqA