cryptmagic
When you import a photo into iPhoto by default (i.e. Unless
you change a setting) then the photo is
copied into the iPhoto Library in your Pictures Folder.
This makes the folders of pics that you made in the Pictures Folder redundant.
To back up your iPhoto Library - including the pics, albums, keywords, faces, places et al, make a copyon another disk of the iPhoto Library in your Pictures Folder. The best way to do this is using a back up utility such as
DejaVu. There are many, many others. Search on
MacUpdate.
Regards
TD