Quake3World

Some one can write little script ? I wont add music in main menu Q3A and that it run automatically. If it possible.

I think you can type:
\music sound/music/win.wav
In the console to play that music file.

I'm not exactly sure about the path (and whether or not you should include the .wav filename extension) though

not work

I think stuff like this is hardcoded. So you have to grab the source code and change it to your belongings, and compile it.
This will end up in a mod, i think its not doable with vanilla-Q3 and just a script...