The package should be Blitz 3D, if I understand fine your question.
For the terrain, look for the related terrain commands, like loadterrain, createterrain, and the like.
The houses, trees and whatever, are merely 3D objects, that is, meshes. These can be loaded with the approriate command loadmesh (if a .X or a .B3D model), or LoadMD2, if it's a .MD2 model.
Each mesh can then be positioned with the command PositionEntity entity,x,y,z , and so placed on your terrain at the needed place.
Hope this has sense for you,
Sergio.
For the terrain, look for the related terrain commands, like loadterrain, createterrain, and the like.
The houses, trees and whatever, are merely 3D objects, that is, meshes. These can be loaded with the approriate command loadmesh (if a .X or a .B3D model), or LoadMD2, if it's a .MD2 model.
Each mesh can then be positioned with the command PositionEntity entity,x,y,z , and so placed on your terrain at the needed place.
Hope this has sense for you,
Sergio.