Background image on individual pages

I'm developing a site for a band using rockstar pro. Each band member (5 of them) have their own individual page on the site. I'd like to set the back ground image for each to be an individual photo of the band member in question. Is this possible? I tried creating child theme to do this, but that didn't work. Any tip, trick, plugin hint, please let me know. This feature would enhance the page a lot. Cheers and thanks in advance.