I like to copy discs and play them leaving my original discs in mint condition on my shelf... The other day i purchased the saw and it seems to have some immortal encryption or something because it won't decrypt. I have used both dvd dycrypter and DVDshrink. Both get stuck and an error appears. Are there any other ways i can back up this film? Also this happened to my copy of dreamcatcher as well.. is there a certain type of disc or file encryption that these programs have trouble with?