Modifying a sub skin
 

I suppose this subject was very well discussed long ago, but I`m rookie here and this forum is so huge... :88)

Anyway, I`d like to make my own sub skins. I`ve already downloaded DatTexExtract and I think I understand how it works... extract, open TGA in PS, edit, save, replace textures. But I don`t know which file to open and edit because skins can be found in at least two SH3 folders (...data/Objects, data/Submarine).

Any help or referrence, please?