[PyMOL] displaying crystallographic symmetry in PyMol

[Charles David Stout]

I want to create a packing diagram from many molecules in the unit cell 
when the structure is one monomer -
I tried-

def set_symmetry(protein_name, 62.843   62.843   82.339  90.00  90.00 
120.00, spacegroup="P6122")

and get a syntax error.
How is this done?
Thanks,
Dave
9-9-08