God of War/Gran Turismo 4 backup problems

[battybackup]

ive been tryin to backup god of war and gran turismo 4 but when i try to copy the disc it says the info contained on the disc is over 4.7gb, too big to fit on a dvdr. i know both programs are less than 4gb big as ive extracted them onto my ps2 harddrive but there not compatable and wont work.
is there a crack or patch to fix this problem?
i assume the TOC has been programed to do this and cause problems for backups.
Any info would be greatly recieved.