I've never had any problems using displacement maps on Wings3D created objects with Carrara.
I unwrap or normal map all my UVs with Wings3D UVMapping before exporting. Models made in MAX, I UVW Unwrap them, same effect in Carrara.
Any application with displacement should be able to use a displacement map on any UVMapped object, regardless of what modeller was used.

Miss Nancy:
No cube mapping in Wings. It has Unwrap, Normal Projection, Camera Projection, Cylinder, and Sphere.

Friends don't let friends use booleans.