I'm looking to get into PC gaming, but first I would like to know how to go about backing up a game and playing the backup. Could I use a site like isohunt or bit torrent to download the file and then use winRAR to extract the image than burn the image onto a disk and be good to go? I've heard about having to use a virtual drive or an emulator to get the backups to play can someone please explain that? Also do most new games require you to enter some kind of serial number or password before you can completely install and play the backup? I know that most newer online games like warcraft require some kind of password but I'm really not interested in playing games online. Thanks.