Ok i have encountered a couple DVD's that when i put in my drive, then click open DVD. It comes up with an error saying "DVD Shrink encountered an error and cannot continue. Invalid DVD navigation structure". Happens with more of the newer dvds. Taledega Nights, Crank, and Gridiron Gang. I dont know if i need to download another program or what. But i would like to have these DVDs and dont know how to go around it. I am kinda new at this so any program that is pretty simple to use would be prefered if there is one that i can use. Help!