How do I make a flag using GIMP?

[Robo Magic Man]

How do I make a flag that's not a bicolor decal flag using Gimp? I'd like to make something similar to the Italian flag from Desert War, where the teamcolor doesn't affect the flag, and it can have more than 2 colors.

 

[Haarbal]

try to open one of the multicoloured flags using dtxbmp.
this way you can see how to balance everything between the alpha mask+normal image