iPhoto sorting question

if you still have the original iPhoto Library folder, simply use an app like iPhoto Library Manager to point to that folder and iPhoto will correctly grab pics and thumbs.

if not, use the Finder and conditional search (kind=jpeg, size=less than 100k, etc.) to arrange the pics in the folder, then trash them at once. i don't think there's an easy way to do it via iPhoto. in fact, it would be better if you erase the iPhoto Library, remove the thumbs as above, then re-import to iPhoto...