Da die Realtracks Bestandteil von Band-in-a-Box sind, gehe ich davon aus, das damit die Information aus den FAQ auch hier gilt:

http://www.pgmusic.com/salesfaq5.htm#23

23. Are songs that I create with Band-in-a-Box or RealBand copyrighted?
The arrangements made by Band-in-a-Box and RealBand are yours, and your songs may be used freely as long as they don't infringe upon the intellectual property rights of others


E. Leobacher
Band-in-a-Box German Forum Moderator and Translator