A Varning!
Cracking BF1942 will only let you play multiplayer on cracked servers wich are very hard to find. Even if you have the original.
See to always backup your original files!
To trix3:
The .org file is probably the original file to use if you have cracked the game and can't patch the it. Use the .org file if so and rename the .org to .exe (now you have a original .exe file wich you can patch to version 1.31). Otherwise you should not use the file.
Also the mod.dll files is one of the no-cd crack files that you'll need to use to skip the cd check (in the mods/bf1942 & mods/XPack1 dirs). Also a GameSpyHost.dll to start a patched private server.
Although i have only found no-cd cracks with the mod.dll files so far, and these .dll files are the ones that won't let you play the game on both cracked and original servers without the cd. So as i said, if you use the orignal, skip the no-cd crack until there's a one without the mod.dll files.
Perhaps there's one out already. Just to find it...