A year ago I switched to Aperture from iphoto and am loving it. When I made the switch I selected to import my iphoto library as reference and not a copy. Now I am running into storage issues on my mac and would like to move all my iphoto pictures to an external hard drive and have them accessible through aperture only. How do I go about doing this? My vision would be that I have not pictures in iphoto. All my pictures would be on an external hard drive and would be in aperture. Any help would be greatly appreciated.