Questions from Dragonslayerelf

I just had a few questions being
Question 1: How do you modify TGA files?
Question 2: How do you modify M2TW's .mesh files
Question 3: How do you modify the .strings.bin files
Question 4: How do you create the map of a M2TW mod
Question 5: Is it better to start with an empty folder and work your way up or take an expansion like Britannia or Crusades (or an unpacked version of the main game)
Question 6: Is it possible to single-handedly mod an entire M2TW mod
Question 7: Is there something which makes this a lot easier?