Originally Posted by Sonartech

If it's running a v6.1 firmware (check the Nav DVD), you're right - it's been moved. I seriously doubt it was removed, however, since that same precious menu also had the magic "Loading" option which is how Lexus Service tells the Nav System to force itself to update its firmware. I also verified that the "Over Ride" and "Loading" options still exist in the firmware for v6.1, they just require some presently unknown magic to make them appear. You CAN, however, make a v6.1 system eat a v5.1 firmware by removing the system from the car (unplugging it) for ~5 minutes. When you plug it back in and turn the unit on, it will attempt to load whatever LOADING.KWI file is on the currently installed Nav DVD... even if it's v5.1 firmware (loading.kwi) placed on a DVD+R containing v6.1 map data, hint hint hint...

"Thanks, Denso. I needed the challenge..."