If you truly want to create a simple ABS signal system with PRR signals, the easiest would be to use signal mast logic.? You have already done the hard part of building the signal head in JMRI.? Just create masts from them now.? The PRR-1956 system has a single head absolute mast with 4 aspects.? You can disable the permissive aspect during the process of building the masts.? That will leave you with clear, approach, and stop.? Once the masts are defined, all that other stuff you want to be rid of will be gone.? Setting up ABS will be super easy.? In the signal mast logic, instead of using discovery, manually set the destination signal and the block sensor and your done.? You could use discovery but that adds the complexity of making sure the layout is drawn properly in the layout editor.? I don't think there is a way you can do it that is any easier or simpler than that.? The red x's when the panel starts will go away as well.
Greg McCartney