@HocusPocus
Maybe the crack is only a 'Fixed exe' and not a full 'NoCD exe'? Use the crack but also put one of those backups in your drive to play. I not sure if a backup of a DVD9 on a DVD5 will actually work as a backup tho? The only way to find out is to try it! But you may have to use a backup on a DVD9 for a fixed exe to work correctly for that game?