How does one print iframes?

I don't believe there's an easy way of doing this. If they're all on the same domain, why are you using IFRAMEs? Why not put the data directly in the page? If you're looking for scrolling, a div with height: ###px; overflow: auto; would allow it without having to use IFRAMEs, and a CSS print stylesheet would allow you to take the overflow/height CSS off when the user hits print.