I have recently installed Aperture onto my MacBook. When I started it up, I said 'yes' create an aperture library from my existing iPhoto library. I then watched in some dismay as Aperture then proceed to 'clobber' my hard drive. I then restored my library as original... having wasted an hour! I was suffering from the delusion that iPhoto and Aperture would share libraries .... mainly because when I asked in the store, "does iPhoto and Aperture share libraries"? the sales person said "yes they do", rather than "I don't understand the question, what do you mean?" I guess I want the best of both worlds. Using iPhoto for most things, Aperture for when I want to get serious. I would then only want to import from iPhoto, stuff I want to get down and dirty with (so to speak) !!!!!! Question: Is it possible to tell aperture to set-up it's library on an external HD, I would use iPhoto for mobility, and Aperture from home? If so how?