Open up packscape and open pack 2 in the mainfolder. Open the textures folder. Find the poster you want to replace remember the folder name it was in and write down the name of the texture you want to replace. Make a new poster of the same size with the same name as the one you are gonna replace.
Start a new file in packscape. Make a folder called textures. In that folder place another folder which is the name of the folder that originally had the poster in it. Such as german for example. Inside that folder place your new poster that is in .tga form and the same size as the one you will replace.
Now save your file as Zzz-textures.pk3 in your ea games/mohaa/main folder. Make sure it's a quake pk3 file when it's saved. You can do that with any texture.

That should work just fine. biggrin: