Well personally - if you are willing (and I mean 100%) to make it for donation I would probably include one picture for background purposes. however for your own profit - you have to be kidding right? If you want to sell a CD with people's work you NEED to give them credit, and you NEED to give them some profit. Other than that - forget it - no one would be that stupid to give you their work and pretty much give you copyright ownership over it so you can make a profit. WiNC