Filling out incomplete residues in a structure in DS2.1?

Hi,

I have a number of pdb files for a protein which have incomplete residues (resdiues are missing 1-2 side chain atoms), is there a script or some other way to fill out all the residues at once? I know I can mutate each one to the same residue to fill them out, but looking for something faster. Have DS 2.1 (w/o protein health) and the free version of DS 3.5.

Thanks,

Gary