Select Snapshot Clips from the Control Panel popup menu.
The first entry in the iPhoto Albums popup menu is iPhoto's main library and not a specific user added album name. All of iPhoto's user created album names will also be listed in the iPhoto Albums popup menu under the main library name.
Select the thumbnails of the snapshot images you want to add to iPhoto using the Shift or Command key. Once the thumbnails have been selected, click the Add to iPhoto button. While the images are being imported to iPhoto, the Add to iPhoto button will be disabled until iPhoto has finished importing the selected snapshot images.
Note: This functionality requires iPhoto 2.0 or later.