Can we control density in Forcite?

Dear all,

I am trying to simulate polymer nanocomposites  in Forcite, a CNT embeded in a periodic boundary box and polymer added by Amorphous Packing  section. We can't define Ramp density in Packing section and for special geometry on CNT, I can't use Amorphous Construction,It will be gratefull if  you can make any suggestion.

As a general question, Is there any way to control density during Forcite MD calculation by using Script?

Regards

Saeed