Don,
Yes it can be done. All of my Gargraves and Ross switches with DZ-1000 motors can be used as spring switches. However, I'm only using one of the Ross switches as a spring switch in a situation like Elliot described above on my streetcar loop. The other end of the streetcar loop uses a Bachmann EZ-Streets switch that has the spring return feature built in.
Hope this helps and Happy Easter to all,
Bill