In the EE there is one folder tools which has converters for the DDT stuff.
From Loggy I got some python scripts which can use the converters. Basically you need to have installed Python no your PC and then doubleclick one of the *.py files to accomplish some conversion from one folder content into another one.
I'm not sure on which do what or where to put what file anymore, but I uploaded what my tools folder looks like for you. So you can try with the python files to convert stuff. If you know a bit of coding right click and edit on the *.py file gives you what it does.
Apparently:
extractall.py will read from the in folder and put into the out folder
in the tga-here folder it looks like tgas are put into .. ehrm, compile textures por out dunno.
Here's the upload (it's my zipped tools folder):
https://ufile.io/a2g47
there are already some tgas and ddts flying around which I didn't delete, hope it doesn't confuse much.