I'm assuming you know this but just in case you don't... You can't just copy files from the CDs to your hard drive. You need to make an ISO, which is a direct copy of the disc, with all the files being in exact same spot, and all of the unused space being copied as well. Basically, the ISO for each disc will probably be 650 or 700 MB reguardless of how much space the disc takes up. If you knew this already, sorry to have wasted your time.