That is referred to as the ASDN patch. It worked with the original CS EF2 games (not with WF). I don't know if it works with the new JTCS games we are playing now.
Also, that patch is not a patch per se. It is an exe substitute. It will benefit your opponent when you start up your turn. If your opponent does not use the same exe when he starts his turn, you will not receive the same "retreat" benefits.