Open your warcraft mpq files with them, browse for what you want and extract it????
Honestly, if the name isn't suggestive enough, I can't help you...
Sorry to be blunt and rude, but if you cannot figure out OPen MPQs -> browse for your warcraft mpqs, go to maps -> campaign and find the extract button, you should try starting with much more basic stuff like reading a tutorial about making custom items or things that leak, maybe you'll get an inch of an feeling of what you want then....
Why do you have to question so stupid stuff anyway when the answer is 1 or 2 posts above?