You'd need a full (purchased) copy of Acrobat. That doesn't mean you couldn't do it any other way, it would just save you the RIP fee. "the higher the dpi the sharper the image but also the smaller the output size" Kind of. Basically, you need to have a certain number of dots (pixels) per inch to get a quality print. I recommended at least 150 or so, although I've gotten decent prints at less, and industry standards go up to as high as 300dpi for really slick publications. It follows that the more actual inches wide you want the thing, the more pixels it will have to have.