step 1 - download the new
jsgme 2.2.0 and unzip it, place the exe file inside your "Silent Hunter 4 Wolves of the Pacific" folder and click on it to install it there
step 2 - download the tmo file for the last version they put out and any patches you might need
step 3 - open jsgme and drag the unzipped tmo folder into jsgme "available mods" window.
thats it, now select the mod to install by highlighting it and click on the arrow to move it into the game