This mod is unbelievable good! It's great job guys!
However I've got some problem with FPS. Sometimes works fine and I have at least 70 FPS doesn't matter in wich compartment and wich direction Im looking at but when I play longer time (about 30 min) and I dive my U-boot the FPS going down to 5-7 frames

when Im in CR facing on engines room. It's fine when Im in engine room (shift+E) and Im looking at engines (stunning job by the way

). When Im turning on CR FPS going down again..
Maybe 4GbPatch could help me but I don't know where to find it. I have 4GB RAM but 32bit system.
Can anybody post me link to this path? Many thanks!