Now it comes as a CD, if you got the game from my source. I still have all the original paperwork that came back in the day.
If you got CAoD, you don't need the expansion pack in the download section here at Subsim, it is already part of the game. If you don't have the "Quick Reference", very important , download it at the download section at Subsim.
Also if you lack a Kriegsmarine grid map, you can hunt and pec for the mission grid on the chart in game, or download the grid map here at the download section at subsim.
Any problems or questions post and someone will respond. REMEMBER-it is a mid 90's game and graphics. Like many games then, they are not perfect.