Just so everone know...sorry for saying this, cus of not talking about non-working-cd-keys. Well I have a real cd key but a copied game and I use the:
BF1942 v1.4 SP/MP [ENGLISH] No-CD/Fixed EXE, crack from "Overkill". And it works just fine for me. I can connect to all servers, but never tried to host one myself.
My friends with a fake cd-key can still only connect to linux-servers, with the same crack.
I use the one form Overkill at
http://www.gamecopyworld.com/game_index.htm
And I´ve noticed that everytime I switch server the game craches. So now I use The All Seeing Eye to find servers. It has a way of finding better servers than the serverlist in the game.
I think thats the way It gonna be. A Real Cd Key to make it all work.
Fake keys have to stick to linuxservers i guess. Maybe Im wrong, but everyone I´ve talked to with fake keys have to stick to linux-servers...