So essentially, you need to run one document using different data file so you're opening those data files from PlanetPress Design, with no change to the document?
When I say "be done through Workflow" I don't mean the generic meaning of "workflow". I mean, literally, PlanetPress Workflow, our product, that does automation through a simple drag and drop interface. Here you could set up a hot folder to receive your data files, then output to a printer directly. This is the simplest, easiest process that PlanetPress Workflow was built to do...
Workflow (which comes in 3 different licenses which are Watch, Office and Production) is what you're looking for. Unless I'm sorely mistaken, it's always included in PlanetPress Suite so you already have a license for it, you just need to use it (or install it first, then use it).