Ways to reduce the system load of GWX (any other supermod):
Activate Light Harbour Traffic Mod (or start at sea with SH3 Commander).
Drop the Particles slider in the SH3 main options.
(as said) Do not use the 16km ATM Mod.
Reduce your GFX cards AA & AF settings. Basically turn them off and work up.
Rather more advanced method:
Open every Ship folder and size down the texture file for every skin. GWX default is 512x512, downsize them to 256x256.
You can also downsize the wakes and wave crest files. These are higher res and more detailed than stock SH3 and will slowdown lower end PCs.
You can also reduce the amount of ships in GWX convoys BUT ONLY if you are patient and versed in the Mission Editor. You can gimp your game doing this.
That's about it. In no way should you try to copy or replace core GWX files. The game will not work.
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