As mentioned in the error it might be a fault from your CD/DVD. You might want to verify the md5sum or try using Backtrack from a USB drive.
The installer encountered an error copying files to the hard disk:
[Errno 5] Input/output error
This is often due to a faulty CD/DVD disk or drive, or a faulty hard disk. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers), to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment.
As mentioned in the error it might be a fault from your CD/DVD. You might want to verify the md5sum or try using Backtrack from a USB drive.
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