adding music to an imported slideshow
I created a slideshow on a desktop mac, burned it to a dvd, & imported it to a macbook. the slideshow plays well, but the custom music was lost. I understand that that's a feature not a bug (presumably something to do with copyrights to iTunes music etc) but how do I add/re-add custom music from the macbook iTunes library to this imported slideshow?
MacBook Pro (13-inch Mid 2012), OS X Mavericks (10.9.5)