Need help from someone with average Photoshop skills and some free time

I know this is lame and not funny but a group of our friends asked me to do this. I have no idea why they thought I knew how to do this, but one of them is hot and I need you to help me out.

They asked me to photshop my friend into pictures of the Jonas Brothers, either replace one of their faces with him, or add him in as the 'fourth brother'. I'm really hoping someone can get him on this Rolling Stone cover, but any other Jonas Brothers pictures will work too...

Thanks a lot to anyone who can help