There's plenty of "virtual cd drives" do that, Virtual CD, Nero's
ImageDrive, Alcohol's virtual DVD, Daemon tools.
In fact, even MS has a small program for XP that adds the ability to mount
ISO images to a virtual cd drive.
If the game's "copy protected" so it demands the original cd in the drive,
there's usually a little more involved
JJ said:
game drive is a program that allows you to copy your games from your cd to
your hard drive. you then no longer need your cd to play your games and
load times are also alot faster because it is loading from your hard drive
and your hard drive runs at a faster speed than your cdrom.