Below is an Arctic camouflage for the Type VIIC. It is designed for GWX 1.03. I have not seen any photos of a U-boat that used this paint scheme. However, the Royal Navy used it for some of their submarines, and I've adapted it as best I can.
Thanks to Lutzow for sharing the British paint scheme, and Steed and Fubar for their help in figuring out how SH3 applies the TGA file for the conning tower skin.
This is JSGME-ready.
Download:
http://files.filefront.com/Arctic+Ty.../fileinfo.html