I'm not sure that anyway has actually confirmed that using TIP4P
in CHARMM gives to correct properties, though people are working
on this. If I get additional information I'll post it. Concerning TIP5P,
it has also not yet been implemented, although it should function.
Again, I'll post info as it comes in.

School of Pharmacy
University of Maryland
20 Penn Street
Baltimore, MD, 21201