When i repainted it, i just replaced the original textures (i repainted it from a set of Buzz airlines textures), what do i have to change to have my repaint and the original (buzz) in
Best advice I could give you is to have a look at the 'Add a Repaint to the FS2002 Default B737_400' tutorial posted in Grumpy's Lair. It outlines what you need to do. The technique also applied for FS 2004