Sounds great! Thanks for serving by the way. I'm leaving for the Great Lakes next summer. I'm going to volunteer for submarine service.
When you install JSGME make sure you place it into your SH4 folder. Once you do that double click it and it will ask you about a MODS folder. Select OK and you should be set. All the mods you download place them all inside of the MODS folder.
Most mods need to be extracted so I would recommend downloading 7zip. So that way once it's downloaded you can place it on your desktop, extract here, then move the extracted folder into the MODS folder.
I'm not doing anything so I'll stand by for your response.
I also use the USS Ohio class for Sh4.
EDIT: Working on that link right now.
EDIT2:
v1.5 Los Angeles 688i class.