The Rescue Disc is $10 but when I bought it the receipt shows $10 but I was charged $15 to my card

I decided to overlook this fact as I like the product, previously using the BART CD.
However, upon downloading the Rescue Disc and trying to boot it I get the message "The file acpi.sys is corrupted.", trying to upgrade it to the latest version results in the same message.
I thought okay i'll replace the drivers folder with the one from the BART CD. It gets past the load bar and shows the Windows XP loading screen but then errors with one of the registry files.
"The registry cannot load the hive (file): \SystemRoot\System32\Config\DEFAULT or its log or alternate."