back up cd cracks ?

[jediboy]

sorry in advance if this is a silly question , ive used no cd cracks before but whats involved in using a back-up cd crack ?
any help appreciated
thanks

[Dr.MAD]

A backup CD crack lets you play the game with a copied CD... but the difference with a no-cd is that you still need to have the copy inserted in the CD-Rom drive to play the game.

So you need a (working) copy of the game if you wanna use backup cd cracks.