Finally! Thanks to you guys i can now create my custom textures for my characters. Thnx for all the feedback!
1) When i export the textures of the characters in Half Life model viewer, the picture format is 256 colors!! Wtf? I can't add decent details or create good looking textures when i can't use more colours than that! (Btw, i tried saving in better quality, but Half Life model viewer can't open a better format, and when saving the good quality one as a 256 colors, all the detals are lost.)
2) Is there a way to add custom sounds to my custom models? (the custom models only)