Gytis is correct, it is available as a separate License.
I use it since it was introduced in the US.
If you use VectorWorks on a regular basis and need more sophisticated capabilities in designing Cabinets, that's the way to go.
I personally find it is a better package combo, than some of the other dedicated programs out there.
My Cabinet Manufacturer uses 20/20 (expensive too) and I have to say that Vectorworks with InteriorCad produces better quality outputs.
My 2cents - Happen to like both programs!!!!!
By the way if you contact InteriorCad, they should have a working Trial Software.