Since I am not good at explaining things, I will expose the whole situation.
I have a Dell Optiplex GX150 and the CD-Drive that comes with it does not work. I have tried everything to have it working but nothing worked and I gave up. However, I got a windows ME emergency disk and formated the HDD but the problem remains. Today I got an external HP CD Writer plus 7500 (2-4x) that connects using a parallel port. When booting up this device is not recognized so I can't install any OS. I went the HP site to check drivers but none of them seem to be suitable for DOS, so I don't know how to get the external CD Drive recognized. Does any one have an idea on how to solve this problem?