Protecting PS2 backups

[el asso wippo]

Hi all:

I´m trying to protect a PS2 backup from being copied. I have tried Freelock and it works well against most programs, but Alcohol is able to copy it.

I need a program to protect this game from being copied with programs like Nero, CDRWIN, etc, and specially Alcohol. I know that it will not be 100% protected, but I need the closest thing to that. I have already seen a PS2 backup protected by somebody else that I haven´t been able to copy, even with Alcohol, the CD is not even recognized by my PC drive. I have no idea what program this person used.

I also tried ccd-lock but it apparently only works for audio cd´s, and tzcopy protection that only works for MODE 1, so no luck.

Any ideas?

Thanks for the help, sorry for the long post