You're welcome. Sorry if we get a little overzealous, but there must be 100 people a month who ask this question on one of the CDR/DVDR support forums, and it's always a relatively ridiculous thing. Most of the people who ask it want to make copies of their DVD's that they can turn around and protect so that they can lend them out and not have their friends copy them.
Of course this seems stupid, because it is - you like the person enough to lend them your illegal copy of a movie, but not enough to let them copy it? In some cases the loser in question wants to hang onto the notoriety of being "the DVD guy" in his/her group of friends. Whatever.
But the truth is that with some rare and very limited exceptions (there ARE ways to keep a DVD from being copied but still leave it watchable that involve a sharp object and physical damage to the disc), it just isn't possible for us, the end users, to put protection on a disc - because the only really useful protections are purely physical, and our burners won't put those sorts of intentional errors onto the blank media.