TeleAtlas DX Navi-CD (US version)

Hello,
I have tried various software, burners, media and still can’t backup my US TeleAtlas DX Navi-CD. I’ve read the thread below dedicated to these cds. I think the majority of people who have had success were making backups of the European version. Any help would be greatly appreciated.
Thanks,
Brian http://club.cdfreaks.com/showthread.php?t=101195