- JSGME is only used by players, you can use the tool in pretty much anywhere you want to, it's not game/application specific.
- The two use entirely different game engines, so don't except to get much if anything to work in SHIII. Atleast without considerable amount of work.
- AFAIK, the harbors in IL2 are more or less built by hand via the terrain editor, unlike in SHIII where "templates" are used (IIRC).
- IL2 was made by 1C, Ubisoft was the publisher.
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It's a good game, but I wouldn't advice to buy it just because you want to know if you can rip something off it to SHIII.