Here is the Sonar mouse click fix for the
GATO sized fleetboats:
http://www.subsim.com/radioroom/down...o=file&id=4099
You will lose the fan in the Conning Tower but the Control Room will be fine. It is easy enough to install without JSGME.
The animated fans use a lot of resources, maybe that's why you are crashing.
If you did install JSGME it would make it a lot easier to see if mods conflict. I know how you feel about not using it though because I have a hand modded install (my first install) still works. I also have JSGME on different installs now.
Happy Hunting!