Actionscript 3.0 : flv and Array question

Hello,

I would like to know an expert's opinion on flv's.  I have a 15 question test and for each question there is an flv to play audio.  I would like to make sure the audio is available to play without any delay, no matter how slow the user's connection is.  Would it be best to preload all 15 flvs?  if so, can flvs be preloaded into an array and then played on demand?  If it is best to preload into an array, any example of code to do this?

Thanks for your help.

Cheers!