Ok..I wanna ask if i could play games like Far Cry,Left 4 dead ,etc from my external hard drive on my laptop.I heard that if i install it on my laptop,it will installs shared files into the Windows directory and entries into your registry, and installed programs list.So i planned to install the games from my desktop.From there i transfer to my external hard drive.Then,i play at my laptop.Will that make any difference?