Loading mp3 dynamically help

Hello, Im a total newbie. Im having difficulty understanding how to load mp3s from another swf file from my player. I get confused on using loadsound, attachsound, using linkage, and other syntaxs from tutorials ive read. All I need are 3 buttons that load 3 different songs and a preloader for each song.

Can anyone suggest a good tutorial for this problem? or where I can find an .fla file to see how the script is properly structured?