Anyone know about EMI copy protection?

I bought the last Prodigy album the other day and it stated that it had Copy Protection technology.

Now I copied it for the car just using Nero with no probs, I also ripped it with media player.
I've got autoplay disabled so since I could do whatever I wanted anyway WTF does this copy protection actually do?

I did do a quick google last night but all it said was that some EMI disks will only play on your PC through the supplied software media player. The disk I have does state that it is PC/DVD compatable.