Lightroom :: Printing Module For RAW Files?

With LR4, JPEG files can be processed from library module to develop module, and finally to print module without involving photoshop. This seems to be a very efficient, continuous workflow. 
 
But I was confused about it when starting with raw files (e.g., NEF)..  NEF files can be processed from library module to delopment module.  Then, there would be  next three options to proceed: a) export and save as JPEG, b) edit in Adobe photoshop CS5 for further improvement,  or c) process in print module to print.   My question is about the last c) option.  When NEF files undergo from library module > develop module > print module, the image on the screen is still in "edited" NEF file  (or "unsaved print" which is displaced on the top of the screen image).  When printed, the picture was printed from "unsaved print" which its format is not defined. I wonder this is the correct procedure for processing and printing from NEF file without involving photoshop.