Excellent. So this app you made, it was able to convert into a readable targa, but the colours were wrong? Even so, the colour might be hard to absolutely verify. I'm afraid that most of what we're doing is new territory for me, but I'm learning as I go and the whole technology is fascinating, but sensical.
Also, all that I meant above was that final converted textures will appear pixelated because of their size. Skinners may have to scale a texture down before working on it and then blow it up again before placing it in the Override folder.