[Gargamel]

If the computers are on the same network.

Have the good computer share it's dvd player on the network.

Then you can open that drive from the other computer.

If you need it to be a logical drive on the 'bad' computer, then you can right click it, and map the drive.

You can do this with any folder too. You could map one computer's documents folder, for example, to be a drive on another.