LOTR: Battle For Middle Earth I & II EditingDiscuss any modding related issues to do with the Lord Of The Rings: Battle For Middle Earth I and II RTS games here.
Quick tutorial: Get a hex editor. (UltraEdit is fine). Open up the *.big file you are interested in. The first line should have BIG4 as the first four characters. Replace the 4 with an F, and it should work fine with XCC/Finalbig, and it will still be read by the game.