This might help.
Don't know if psp or whatever u have can do this though.
I edited the whole folder as a batch again, and changed every image from the default tga to jpeg.
This way, my computer could read in thumbnails what the image looked like initially. This beat opening each one by hand to see what it was.
I started to seperate different images that I think go together and such and was coloring them seperate. For things i could not find where they were in the ui, i made them a bright green. This way, when it's ingame, I can see where the bright green is and know what that is now.