Thanks, but that doesn't help me. I have a working printing functionality, but just like David described above I think it would be nice to be able to print in a larger format that is larger than the screen size (and not just get an small picture that is re-sized which doesn't look good at all).
Tony mentioned using "the export method (rest) on each mapservice, you can pass in whatever extents you want."
And this is what I'm asking about, if anyone has tried that successfully.