J,
Here is my story... I initially hard wired my EasyTouch to the Protocol adapter inside my house, because I felt that the wireless system just added more complexity. Worked great for a year or so, until my neighbor took a direct lighting strike. I got what was left over..
The lighting came in on my hardwire and took out the main board, and surge card (SWCG power supply) inside the EasyTouch. It then traveled down the hard wire and took out the Protocol Adapter, the home network switch it was connected to, as well as all the things that were also connected to that switch.
I now use the wireless links that came with the Protocol adapter.
ScreenLogic is an easy DIY project.. Since you only have one physical com port, you can just connect all the inputs together, and then run jumper wires from the splices to the com port. It appears to me that your IC40 is the only thing connected to your com port now... If that is true, then just connect both the IC40 and the ScreenLogic to the same connector.. You can have many items connected to the same com port.. The limit is how many wires you can stuff into the same connector. Two wires in each pin should work without any problems.
Thanks,
Jim R.