I am new to CD Freaks and don't know how to post a question, so just replying to someone with the same problems.

I can not backup my Lexus 2007-2008 Navigation DVD and have tries all the recommendations on CD Freaks and now have about 45 coasters, this will eventually end up costing me a new car just to get a backup Disk.
I also have a heat problem living in South Africa and many of my CD's in my car have turned into warped coasters. The Car becomes an Oven.
I am trying to backup a 2008 IS250 Lexus navigation DVD 2007-2008 ver1 and have not been successful. What puzzles me is the disk shows as a data DVD Rom and the content size is only 325 megabytes and this does not seem right . I presumed it to be more that 4 GB with all the information it gives. I now do not use my very expensive Cars DVD Navigation for this reason as well as it does not give traffic camera update posibility. Make a note of this when purchasing a new car, do not get on board Nav go for Garmin its Cheaper and more useful. I can't understand why they would leave out something so important to a driver on a Cars Inbuilt GPS. Maybe poor planning and no foresight. I now drive a Luxury Car with so called top navigation switched off and a Garmin stuck to my windscreen.