I just purchased Red Baron Pack
When I run Red baron 3D it is asking for the CD?
hip63 :P

Strange, maybe GOG removed their version of the fixed exe for it was known to cause problems with the RB3D multiplayer servers that are running security.
However, one has not need a CD to play RB3D since the beginning for there has always been a work around. In the message window that requests a CD, there are four black crosses. The cross on the upper right, click it six times and the game will run.
http://www.redbaron3d.net/

Oh, that message. Do get sometimes for RB3d and other games, but still never stopped me from playing the game. Has to do with XP and Vista, not the game itself.