Actually there are many many games that copy protected in as such a way that they will not allow you to play unless you have the original in the drive let alone be copied (Starforce, Securom etc. Infact Securom has even blacklisted GJ or at least tried to). Even if you somehow are able to make an exact copy, the disk will still have to be in the drive.
Game Jackal (or did--who knows if Sly will be changing how GJ functions) will allow a legitmate owner of a game to make a profile so that the cd/dvd will not be to in the drive in order for the game to launch. Legitmate owner is the key word here. GJ will not allow you to pass your profiles around so that others can play. The profile will be machine specific. The idea here was to reach a happy medium between the buyers right of fair use and the makers right to protect their games from being pirated. It also avoided the owners from looking around for nocd cracks etc. just so that they could keep their disks put away in a safe place. So GJ is not a program that allows one to copy PC games, it just allows one to play without their owned cd/dvd in the drive.