It removes all kinds of restrictions(CSS, RPC Region code, RCE, APS, UOPS etc.) from the DVD discs in the background.
Through this software your player will be able to play all region DVD on all DVD drives with mismatched region code without changing the region code. You needn't hack DVD drive (flash firmware) which is very dangerous.
DVD Ghost also allows you to copy your DVD movie to hard disk if DVD copy/backup software not installed in your computer.