[Chimera-users] addh question

Hi, I am analyzing water-water and water-protein hydrogen bonds in a dataset of high resolution crystal structures. As part of this analysis, I will need to add hydrogens to water molecules and to the protein. I was wondering how well the "addh" tool can place hydrogens on water molecules in the first shell around the protein? If addh is not the right tool for this task, are you aware of any freely available programs that can add hydrogens to 1st shell water molecules in PDB files? Thanks for your help! Sincerely, Peter Law Graduate Student Biochemistry Department University of Washington