Electrostatics/surface visualization

Dear all,

I would like to use the free DS to see a surface with electrostatics,

similarly shown in the picture (right part) next to "Discovery Studio

Overview":

http://accelrys.com/products/discovery-studio/

As input there is a *.pdb (directly from the PDB) as well as a *.mol2 file available.

So far I managed to display a representation using "partial charge" and "CPK",

but I think it is not as helpful as the electrostatics/surface representation. Thus,

is there a way to achieve this in the free DS Version (v. 3.1)?

Thanks a lot for any hint/help in advance,

Gerd