Need help installing Leopard - INSTALLER LOG INCLUDED

I have been have trouble installing Leopard on my Macbook, included is a copy of the installer log (errors only).

http://www.4shared.com/file/55147396/d2ce4e4f/Installer

I have tried installing it about 10 times or so but it has resulted in failure every time. I remember have similar problems with Tiger and it took me about 20 tries to install Leopard when it first came out (same method each time). I don't know why it worked all of a sudden. Perhaps I have a hard drive failure?

Any comments and suggestions are appreciated.

Thanks.

 

"The volume Macintosh HD appears to be OK"

That is why I don't understand why it does not install properly. It isn't my install DVD because I have tried using another friend's, and I have had similar problems in the past with Tiger. I suspect a hardware failure? I brought it into my local Apple retailer and they said there was nothing wrong with the memory... but they did not check the hard drive.