Regarding remote bumper launchers, take a look at the DT Systems web site and click on the remote dummy launcher video. Www.dtsystems.com
you can control 16 launchers with ONE transmitter and the system only cost $399.99 and it's powered by inexpensive 22 blank loads.
The video is really cool.
It's suppose to be available in September.
There has already been some web sites advertising it.