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I have an 02 es300. I am currently using navigation disc version 4.1. I know that 7.1 still has the ovveride option because I burned a copy and it let me do it. The burned copy doesn't work well as the navigation randomly doesn't recognize the disc so i switched back to the oem disc. I heard that after version 8.1 the navigation loses the option to ovveride and it is gone forever if u try to switch back to an older version. I want to know if anyone has upgraded to 8.1 or later and still has the override option. I am considering the newest version 10.1.