I think I should elaborate the problem a bit.
I am using Custom IC Design Tools, Virtuoso Front to Back Design Environment IC220.127.116.110.14.
I use Import form in the VHDL toolbox to import .vhd file into virtuoso. As all my files are behavioral, I wanted to know can this VHDL import form import behavioral VHDL files. There is option in the import form "import structural VHDL files as" with options Schematic, netlist and vhdl, what am I supposed to select when the files are behavioral ?