Last I heard no one ever was able to get the 7.1 data to work with the 5.1 loading file by making a hybird DVD, I know they did get the 5.1 and 6.1 data files to work. I will say I tried it when I first got my Tundra since I got the 7.1 disc with mine but never did get it to work. But I have been sucessfull in making a backup of my 7.1 DVD since I keep the orginal at home safe and sound just in case something happens and I also have the ISO backed up on my computer HD too. I will soon be installing one of these units soon myself so I wont have to deal with the locked down GPS system. Oh and I got to think if your selling these DVD on
ebay you could get yourself in some trouble with Toyota if they realy wanted too but I am not saying I agree or disagree with the idea.