VSEPR theory for large molecules?

[pdavis68]

Everything I've read about VSEPR theory (and granted, it's mostly basic stuff) has been with a central atom and the atoms that surround it. How does VSEPR theory apply (if it does at all) when you're talking about more complex molecules. Say an amino acid? Do you simply have to pick various atoms as the "central" atom and apply it to the atoms that surround that atom, then move to another one?

Obviously some atoms are going to have bonds to atoms other than the temporary "central one", I guess I'm just wondering, does the theory abstract out that way to larger atoms?

Thanks.