If you installed JSGME into
SH3 Commanders program folder then you need to add a further folder to the mod. Remember to disable the version you have just tried.
Make the folder tree of the skins look like this.....& then copy it into the MODS folder inside the SH3Cmdr Program Folder.
GWX Skin Pack > date > etc etc.....
I personally prefer this approach as you can easily remove the skin pack, if (say) a new version or updated version is released.
You can check to see if it has worked correctly by checking the size of the date folder in SH3 Cmdr. It should be around 1.6GB.
Please note that these skins are date based and most should appear in game around 1943/44 if you want to check in the museum.
Just so you know, the first folder name in any JSGME ready mod is never used, so if your first folder is called date than all folders after that in the tree are the ones that are copied into the folder that you want to enable the mods for.
Alas Klar??