I am fairly new to a mac and have put my pictures from my windows machine into the iphoto library. I am not sure I like the way iphoto groups my photos. I have everything stored under my "pictures" folder. I then I have data folder with pictures in it, an original folder with pictures in it, and then a modified folder with pictures in it. I understand why the modified picture folder is there, but what is the data folder there for? I also have a bunch of .data and .iphoto icons scattered throughout, do I need those? Another question I have is when I import new pictures from my camera it puts the pictures in a new "roll number" folder unless I name it specifically. What if I want to combine it with another folder later? Sorry if I am unclear about things I will try and clarify if needed.