[dunkelgrun]

Ah, I see the problem. You don't need to save back through ViewIMF, Il2 will read the default .tga files created by Gimp (don't use RLE compression) and probably PhotoShop too. To make the .tgb just take the skin1o.tga and change the extension to .tgb.

That is how I did the skins for the Asheshouses's Tribal class destroyer pack (over at SAS).
http://www.sas1946.com/main/index.php/topic,8182.0.html

..and if you are still having problems (for a long time I couldn't get into the Japanese carriers' .tga's when making the Midway skins) you could try this:
http://www.converthub.com/tgatojpg.php

:cheers: