How do I Re-install iphoto on my imac?

reinstall iPhoto - go to your receipts folder ("Your hard drive" ==> library ==> receipts) and remove any iPhoto receipts and reinstall from the restore disks that came with your computer - do a custom install of bundled software only

For more information <a href="http://www.macworld.com/article/132243/2008/02/pacifist.html"> click here for the MacWorld article on reinstalling OS X applications.</a>

LN