Thats cool... Basically you have to have a DVD recorder that supports writing the booktype to ROM. If it doesnt then you cant make a backup... I used NERO's free version and it worked the first time on my computer but my laptop didnt work... I did some research on the DVD writers in both computers and it turns out the one in my laptop will not write booktype ROM.
If you are making coasters its because your writer is not what you need... its as simple as that!
If you need help obtaining a working backup copy... you can still PM me!