The Lightwave (v6) file format is found here:
http://www.newtek.com/products/light...o2.html#H_file
Jim, what version of Lightwave do you have?.
I've been searching for that "vertices groups", but i haven't found them in the file specification.
Each vertex (point) has a reference in the "Polygon List", the "Vertex Mapping", and the "Discontinuous Vertex Mapping". It's specially interesting to know that the vertex mapping has a property called "PICK": "Selection set. This is a VMAP of dimension 0 that marks points for *quick selection by name* during modeling. It has no effect on the geometry of the object.".
Jim, is this property what you call "vertices group"? If not, please could you take a look at the specifications and tell me where do you think it is described?. Thanks.