I used Nero and tried to copy Diablo 2, the play disc. I thought it would work since the autorun came but once i clicked 'play diablo 2' it came up with a error message saying 'make sure the diablo 2 play disc is inserted'. I read that using alcohol 120% is the easiest way to copy diablo 2. I am new at this so go through the process slowly telling me the easiest way and all the programs i need to use.

Use the securom new datatype settings with alcohol and make sure that you enable Ignore media type in alcohol's emulation options if you want to run the back-up copy from a writer (unnecessary if you run the back-up copy from an ordinary cd/dvd rom).