hey, so i have a dvd with a program, has a.dmg, when i try to verify it gives me an input output error, i have skip the verification before and have started and completed installation but most components of the program suite do not install. the dvd is a little scratched, i tried to copy it in a dual burner and it failed. can i buff the dvd with a skip doctor or something of that nature? i have done it to movies but never software. or possibly a different brand of recordable dvd. any suggestions, im going nuts.