Maybe this is silly but i just thought of a easy copy protection for cd/dvd car navigation systems and game consoles etc. :What if they used discs with custom media descriptors and players that would only work with that specific media descriptor? I mean, corrupt files can be emulated and written to discs easily, but media descriptors can
t be changed right? Theyre already on the writeable discs when you buy them? This would be possible to change by patching the bios though.