I have a mac pro 2007 model. It appears I have a corrupted sector on my the hadrive tha has my operating system. If I use the install disk that came with is (Tiger) can I still get my lion back.

I have mac pro 2007 model given to me, I updated it to lion about six months ago, and I do not have a time machine.
Lion stopped loading before I get to the login screen,
I tried all the tips, doing a option/shift/v. I noticed several fsk_dsk errors that it could not fix on my boot drive.
Restore would not work either. The only physical copy I have is the install disk that came with the mac. I think it is Tiger.
If I put this operating system on will I be abel to upgrade it to lion, and if so will I have to pay again?

The Lion Recovery Partition has its own index. Your Macintosh HD partition is the one with the troubles.
If Disk Utility cannot fix it, you may need to apply different Utilities, such as Disk Warrior.
Some readers suggest that the best disk repair is to erase the drive and restore it from your Backups.
This might be a good time to consider getting a new drive to have on hand. This would allow you flexibility in copying, fixing, and (if needed) replacing the drive with the problems.

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