I did some text modding and converted IXD2 uboat to US side with Us crew and german weapons & equipment. Not tested extensively but it seems to work with stock 1.5 and TMO and Game Fixes only mods (single missions & campaigns)
I merged & edited some configuration files (mainly .upc files with Notepad)
https://www.dropbox.com/sh/autzc0xr9...0side.zip?dl=0
Grab it while you can. Hope you like it.
Known problems: 20mm AA guns not working but 37mm at least appears...
(btw This is my first post - I've been lurking here for years.)