The problem is that it's not a model. It's a Binary search tree tileset
Each sector of the map is broken down in to subtiles and each subtile is furthur broken down. I think the map is 256x256 tiles but there are "repeats" like the water and such. We were unable to decode the individual tile models because when we moved a byte, it meesed up the binary search tree and caused it to go blank.
It's really a tricky format.