I just found my super old copy and I have an install disk and a like... cinematic disk and I'm not sure if I'm missing a play disk or what XD --- http://img.photobucket.com/albums/v139/lain8/ohitislove.png Oh, it is love.
Yeah, you're missing the play disk. There are 3 disks total. If you can't install it because you're missing a disk, you can go to battle.net and register for an account, then digitally download the game using your cd key. --- -Darknut2627