[MMTK] Adding/modifying forcefields

[david.evans at ulsop.ac.uk]

Hi,

I'd like to use the Amber99 ff, in conjunction with gaff to describe
ligand binding energetics.

I have, I think, understood how to create new molecules using
database files in
.mmtk/Database/Molecules
and would like to do something similar for forcefields i.e. without
modifying the base distribution.

Thanks

Dave