Just asking to see if this is possible? I recently bought a Sony Alpha A200 and have been shooting in RAW format. When i import into iPhoto, it creates a JPEG of the RAW file and places it into the 'modified' folder and places the RAW (well... the ARW) file into the 'originals' folder. When displaying photos on screen is shows the JPEG and if you want to edit that it edits the RAW and recreates the JPEG after editing. Question: Is it possible to have the 'originals' folder on an external HDD (as the RAW's take up so much space) and the 'modified' folder still on the MacBook so when my external HDD isn't connected, i will still be able to open the images full screen (the JPEGS)? Many Thanks!