I need to model a protein with multiple chains and have found several templates for comparative modeling. I want comparative modeling to output a structure that has a ligand binding with it, and I've noticed at the bottom of the tutorial that after adding the tag use_hetatm=1 to my xml file, any ligand that I want to model with will be taken from all templates with non-zero weight. The tutorial also emphasizes that ligands must be added to all templates with non-zero weight in the xml file, but one of the templates I'm using contains no ligand. That structure is a necessary template and I can't build my model without it. Is there any suggestion about how to model the ligand in this situation?