This reference CD has everything you need to make your game playable! -
Game Rules in PDF format - first edition & 2nd Edition
Game charts, log pads, counters, and variant counters.
Plus - A PDF with all the Avalon Hill General magazine articles in it.
BONUS - This CD also includes the SPI mini-game The Battle of Tsushima! with counters!
This is a very nice to have addition for the game with scenarios, variant counters, and additional rules, commentary, and discussion.