Importing step as symbol, and make sub-parts symbols as well?

[MFpsrig]

We have made an extensive library with parts and subassemblies in Alibre and exported them to step. I use alibre for detailwork and VW for large venues. 

 

However I would be nice if when I import for example a pulley assembly into vectorworks as a symbol if the sub-parts of the assembly also would become symbols directly. Instead of a bunch of groups, generic solid and Nurbsurfaces. 

 

Is this possible to do somehow, witout having to rebuild the part in vectorworks?

This would be very nice as I'm also trying to build a good library in vectorworks, with all the bolts and nuts etc. For future Bom-lists for example.