Go to C: program files/Ea Games/Battlefield 1942/mods/bf1942 and using notepad or word pad make an init.con file save it and place it in the directory above. This is the default init.con before you put the merciless mod on your computer. Put what i wrote down into notepad save it and put it where it belongs.
game.setCustomGameName BF1942
game.addModPath Mods/BF1942/
game.setCustomGameVersion 1.31
game.setCustomGameUrl "http://www.battlefield1942.com"
Game.setMenuMusicFilename "music/slaughter4.bik"
Game.setLoadMusicFilename "music/vehicle4.bik"
Game.setWinMusicFilename "music/vehicle3.bik"
Game.setLoseMusicFilename "music/menu.bik"
Game.setCampaignLoseMusicFilename "music/theme2.bik"
Game.setDebriefingMusicFilename "music/briefing.bik"
The one below is the merciless init.con and should read this.
game.setCustomGameName BF1942
game.addModPath Mods/MC1942_Crosshair/
game.addModPath Mods/MC1942_TexSet/
game.addModPath Mods/BF1942/MC1942_BloodFX/
game.addModPath Mods/MC1942/
game.addModPath Mods/BF1942/
game.customGameFlushArchive 0
game.setCustomGameVersion 1.31
game.setCustomGameUrl "http://www.battlefield1942.com"
Game.setMenuMusicFilename "music/slaughter4.bik"
Game.setLoadMusicFilename "music/vehicle4.bik"
Game.setWinMusicFilename "music/vehicle3.bik"
Game.setLoseMusicFilename "music/menu.bik"
Game.setCampaignLoseMusicFilename "music/theme2.bik"
Game.setDebriefingMusicFilename "music/briefing.bik"