My wife has done these in the past: using old family photos set to appropriate songs as a video slideshow for family funerals. We'd like to add this as a service we offer, but have run into some confusion about licensing/royalties as regards using actual (non-royalty-free) songs. Has anyone run into this before?

I know for sure that we need a synch (sync) license to put the song(s) to video, but I think we need a master license for public showing, although I'm not sure on that. I found a site (zoomlicense.com) that supposedly licenses some songs for you on the cheap, but I have to create an account to see their song list.

Any ideas?