I guess I didn't comment on this thread back when it was new, 'cause I thought Freezy and Tron made it pretty clear to not mix DishNet and FTA.
ANOTHER consideration, is that DishNet receivers need constant access to their satellites.
If you disconnect them, they may 'hunt', and will most definitely throw an error that you have 'lost a satellite'
Depending on the situation, you may get a knock on your door from a Dish installer, wanting to fix your system.
If not, the regular outages may be reported to headquarters, making the Dish Nazis suspicious of what you are doing.
So, disconnecting during daily user access to the FTA dishes is not really going to work out for ya.
I don't think we're going to come up with a good solution, based on your comments that you have a single FTA receiver and multiple DishNet receivers...
...I have a FTA FS 4' dish on a Powertech motor with a Pansat 9200HD receiver.
DN runs into a GE comm system (Second floor) which routes the incoming signal to multiple rooms in the home.
I currently have DN running to all rooms (three receivers).
What's a "GE comm system" ?
If you have three DishNet receivers, all ya need is an appropriate DN satellite switch, to hook up those receivers...(??)