Honestly, if you're familiar with Xcode try writing a simple serial command stack that you can run as a dynamic shell script. Use Applescript to initiate the shell script commands to do the following commands:
Open Shutter
Close Shutter
Power On
Power Off
etc.

Basically, just write your own serial interface for projector control and that way you can have a single serial device running both and you don't have to use the clunky slow ass web interface for the projectors.

In fact, if you're any good with interface builder, write an application with buttons on it which perform projector operations and then link operations to Triggerable events for SAMSC-Lite to run.