I have two expansion CD's (1 classic) but I only have 1 known CD key. Is there a way to get the CD from both discs without infecting my computer? If I'm using two computers will I have to completely reinstall on one if I get that second CD key? Thanks.
The key isn't stored on the CD. It's usually printed on the inside of the case, so if you lost the case, your key is gone. However, if you still have the installation on a computer, you can simply copy the Diablo folder to another one and create the icons, shortcuts etc. by hand, as the key is encoded into the game files during the installation.