Distributing these copies to others or using unauthorized versions of games is considered copyright infringement.
By version 2.73, the developers had reverse-engineered the most common protections of 2004-2006:
If you find a copy of Game Copy Pro V 2.73 on an old hard drive, treat it as a museum piece. But if you need to back up your 2002 copy of Warcraft III , use for video discs or MPF (Multi-Purpose Framework) for game discs. The legacy of Game Copy Pro lives on in open-source code, but version 2.73 itself has finally joined the archive of history.