Audio help

hi guys! im having trouble in manipulating the sounds in flash…i have created 2 different swf file the first one is that i put 5 diff sounds and the second one is the button that controls the sound on the first swf file. My problem is that i dont know how to load diff sound on the first swf file, do you know any tutorial on this? Please help me i really need to finish my project. Thanks a lot!