Problems during Backup Restore: Keep getting restart message

I don't know what to do. I just bought a WD Scorpio 320GB 7200 to be installed in my 07 macbook. The operating system is to date with snow leopard on it. But I don't have the snow leopard disc. I have the regular (luckily). Everything was going well..

Using disk utility >> I formatted the drive the MAC extended (journaled).
I did a restore from Time machine >>> It saw my drive. I picked the restore I wanted.

The restore looked good (1 hour process, actually faster).

When it said to restart...thats when there's problems. After restart all I see is the "please restart your computer. You can do this by holding down the power button". When I restart, it just keeps coming back to this message like the HD is corrupt. But its not corrupt.

I don't know what could of caused it. Could it be something to do with me using 10.5 installation disc to restore a 10.6 backed up system?

Any help would be great. I have looked everywhere for some answers and all I get is this stupid problem about how they can't see their hard drives. Mine seems to be some weird case.

Thanks