The Entire Problem that causes game crashes concerning Land Mines is due to the Immobile setting. Immobile means it cannot move. When the AI or human tries to unload from water to land, the Unit has to MOVE from the Ship to land and because it is Immobile, this is impossible, and the Game Crashes. IF an Immobile unit is unloaded inside a city or Airdrop is used, either the City or the unit that does the Airdrop is the thing that MOVES and all is ok. We do not want land mines moving (Sliding) on their own so the Immobile setting is used. The Key is to have land mines set with the Immobile setting and set a unit as a "LAND Transport" rather than water transport to carry them. This eliminates the water to land issue and no game crashes. Set land mines with airlift ability so airports can be used to take them to other cities and also use Paradrop so the land Mines can be paradropped the max squares (8). As long as the "Land Transport" or "Land Transports" of your choosing is or are the ONLY units that can transport the Land Mines and this is ONLY on Land, the land mines will not be able to crash the game and the AI should also be able use them. Main difficulty with this is arranging the settings for the land mines and all transports so the land mines can ONLY be transported by the "Land Transport" or "Land Transports" chosen to be used for this purpose. Prevent Land Mines from being loaded or unloaded from any Water Transport to land and all will be OK. The settings that would be necessary to prevent Land Mines from being Loaded and unloaded from Water Transports (Ships) is the Big problem because in order to prevent water transports (ships) from being able to load Land Mines would require major game setting changes that would also prevent Ships from being able to load other units as well. I have not found a Unique setting that could be applied to Land Mines ONLY, where the necessary settings would prevent Loading on Water Transports (ships). I understand that many people want the AI to be able to use Land Mines as well but the needed editor settings simply do not exist to make this practical. Rather than have to radically change the game settings to accommodate the use of Land Mines for the AI, I recommend the Human player use Land Mines Only and Not give them to the AI. Bottom Line: IF you want the AI to use Land Mines you will have to Prevent Land Mines from being loaded to Water transports (ships) so they cannot try to "unload" these Immobile units to land...or set Land Mines with ability to move so they could be "unloaded to land but this would would be Extremely Funny at best, watching land mines run around in the game. Perhaps Fraxis will provide a unique editor setting we can use for units such as Land Mines in the Future.