Vista - enter autotext

New PC with Vista and 2007 office suite -- no time this week for "training" but have numerous docs to create, dupe, revise, etc. I always insert the path/filename at the bottom of each doc -- used to be part of autotext feature under headers/footers -- can't find it now. Need help asap -- 1 -- where to find and 2 -- how to add it to ribbon -- later I'll get to creating macros.

Thanks a million in advance