Also known as iPhone Configuration Utility.
- Pick the original .ipa app file on finder to tag the app(s) for installation.
- After plugging in the device, go to the Applications tab and look for iPhoto, click install.
- Wait for it and behold.
I wonder if Apple specifically limits the iPhoto only to run on newer devices just to encourage users to upgrade. The app — though a little sluggish on larger files — works just fine.