Games on External Hard drive

Is it possible to install and play games on an internal hard drive? AndcanI then play on adifferent PC/ Laptop?First thingI want to try is just cut and paste and game to my external drive but I figured I'd find out if other people have done similar things. I know it worksfor Demo's, thats about the only thing I've tried so far. Any tip/tricks anyone can give me?
Peace.

some games work fine, others such as freelancer have some minor f ups( such as the font changing size to gigantic), but i found many of the high graphic demanding games like to place some important files in windows folder which means it probably will f up on you if you try playing on a different comp

buts its always worth a try

by bad I meant EXTERNAL hard drive.cooooolgy13

As long as you are using USB 2.0, then you will get excellent performance. I have all my games installed on an external 360GB HD. I am running Bioshock at 1280x1024 max settings for DX9 with no slowdown, even during Big Daddy fights. :)