On my MacPro laptop (OS X 10.6.8, 2.2 GHz Intel Core 2 Duo)I must have accidentally removed a part of iDvd 8. How can I reinstall it? I've looked into upgrading but that doesn't solve the problem. I've looked in Apple App Store but they only offer iDvd 11 which my Mac doesn't meet the screen requirements. How or where can I get this replaced? Thank you.