theres something left out ( for gimp users)
if you got the error, when importing the TGA back into DEdit, saying somehting about " unable to open , make sure compression is 24bits - 36 bits etc. " something like that
SOLUTION:
when you edit your file in gimp , and are about to save it, choose the directory, and when you save it, a window pops up asking to use " RLE COMPRESSION " and the "ORIGIN"
dont worry about the origin, but uncheck the RLE compression box,
it compresses it to an unknown format to DEdit , then just import it back into DEdit