It turns out that the Massoth 4 channel switch configuration is pretty simple. There is a function for 'continuous operation' in the Attachment 1 section of the manual:
You set this on the Special Functions of the 8 outputs. In my case I only wanted the power to stay on when when triggering in 1 switch direction, but not the other, so I set CV51 to 0, which is half of the SW1 pair. So now when I select the switch address and throw it in 1 direction the relay engages and switches the power to programming. Then when I throw it the other direction the momentary switch function engages and then it turns off, which reverts the relay back to track power.
It just took some digging through the manual's CV setting to figure out, but you can easily power any motor this way for accessories and use switch addresses or you can set the decoder for loco addresses, which then allows to convert the decoder to 8 independent function outputs as opposed for 4 switch/motor outputs.
Hope this helps someone down the road trying to do something cool with layout accessories. Its opened up a bunch of possibilities for wireless remote control from the Nav.