To edit your thread title to a descriptive one, since Iomega is only the name of the manufacturer of the external HDD and has nothing to do with what you really want, to get a knowledgable audience and help making the thread easier to find for people looking for the same information, just click on the
button on the bottom right of your original post and then click the
Just open the Finder (the icon with the goofy smiley face on the left of your Dock) and navigate to the external drive. Then select whichever photos you want to import and drag them onto the iPhoto icon in your Dock.