I've got about 2,000 pictures from my internal HD I want to add to iPhoto to organize, etc. My question is, from what I understand, iPhoto just makes a copy of the original image. So if my goal is organizing these pictures and then being able to back up or distribute the files as I wish, what do i need to do? Can I just import the files into iPhoto, delete the originals from my HD, and then organize them as I wish? iPhoto isn't changing the quality/size/format in any way unless I make changes, correct? Where are they stored once they are in iPhoto? Can I transfer them freely from an external HD to a PC without any quality/size etc changes? I've seen the export tool but I'm not sure if that would work well for the whole library and i dont know if it would compromise quality in any way. Thanks in advance.