Lori
Welcome to the Apple user discussion forums
Do not delete the iPhoto library in your pictures folder
trash the iPhoto application (in your applications folder), the iPhoto preferences ("your username" ==> preferences ==> com.apple.iphoto.plist) and all receipts with iPhoto in them ("your hard drive" ==> library ==> receipts)
Install from your iLife 08 disk or the systems restore disks that came with your computer (install bundled software option or
click here for MacWorld's instructions.
LN