Hey guys I'm not sure how many people know about this site so figured I'd throw it out there for ya. Block Posters basically lets you upload an image and expand it across a set amount of pages into a pdf format for you. I find it great for doing draft enlargements and and printing projects that are bigger than 8.5x11 in great accuracy across multiple pages.
I know you can do it in photoshop and illustrator, but for those that don't have the programs at home this site might help you with certain projects. So give it a look see.