There are different types of copying stuff...
In russia and in asia they have these big manufacturing plants that can press silver discs, this often happens in the "backyard" of CD/DVD-r producing plants.
MiRRoR is using a patching method developed over at the cdfreaks forum.
Check here for yourself
http://club.cdfreaks.com/showthread....&page=12&pp=25
too bad an honest communitys hard efforts is stolen and used by a warez group... :-(