Creating new residue types

Hello Modeller users,

I am building a homology model from a template that contains hetero atoms that I don't want to include as block (BLK) residues. This means that they must exist in the residue type library (modlib/restyp.lib). Before I attempt to create two new library entries, I would like to know if somebody has already done this for the HETATM entries that I am interested in. They are

FDP (FRUCTOSE-2,6-BISPHOSPHATE) and AMP (ADENOSINE MONOPHOSPHATE)

Thanks, Christian Barrett