Hi,
The big question is: Do you have backups? If so, re-partition and start it over.
This is precisely why I do not recommend people use Partition Magic or any other partitioning modification schemes. The partition is the core of your volume... and by moving it around, you are changing the disk structures installed.
If it was that easy to do, and risk free, don't you think the major distros (Win, Mac, Linux) would come with this simple free utility? Nope.
I think your drive is cooked. Re-reading that you didn't backup, well, you are cooked too.
Don't mean to be a smarty, but prepare for a long night ahead as you rebuild the computer from scratch. I have unfortunately seen this too many times. You will know next time to backup and then check those backups before proceeding.
Christian