Cloned HDD won't open files

I replace my HDD with an SSD and moved the HDD to the SuperDrive. Then I cloned my HDD to an external drive and formatted the original drive (unfortunately without checking the external backup). Now the backup shows all the files that I want, but it gives an error saying that it cannot be opened. Any ideas why this is or what I can do to fix it? I've tried booting from the external drive but it doesn't show up when rebooting while holding the option key. Thanks for any help!

-smurdockii

PS: I also installed snow leopard on the SSD, I originally had leopard on the HDD

 

I used disk utility to 'restore' my internal HD to the external drive