Currently Being ModeratedSep 10, 2012 1:47 AM (in response to 1sngwrtr)
I'm not sure of the nature of your question to be honest.
When you say mastered, do you mean a stereo bounce from the arrangement page?
If so then you just pull up the original song file you bounced the track from.
If however you're tring to split the stereo master back into the tracks it came from using only that stereo track then it can't be done. It's not posssible.