Ok you need a .DDS plugin for PS.
Get it here:
http://developer.nvidia.com/object/p...s_plugins.html
The conning files are here in the game:
Ubisoft\Silent Hunter 4 Wolves of the Pacific\Data\Textures\TNormal\tex (there is also a LRes folder with the same stuff, but who uses LO-res nowdays

)
Do a search for "NSS" in that folder and you will see all the conning towers.
The files you want to work with are called xxxxT01.dds (early towers 1941-43) or xxxxT02.dds (later towers 1943-45)
There are some files in there called xxxxxO01.dds, these are occlusion or light-maps and is used only to render reflections and stuff in game, no need to touch these if you only want to apply some graphics.
2nd, you have to find the location for the Insignia, i recommend to use the "Checkerboard" technique for this, explained here.
http://www.subsim.com/radioroom/show...t=checkerboard
Happy painting