Hi Ted!!!
That's about Linux, not Windows. Link is broken, but PDF can be found on SVN. Link about Windows GHPSDR3 are on first page, hard to loose ;-)
http://openhpsdr.org/wiki/index.php?title=Multiple_independent_receivers_-_how_to_set_up_on_Windows
Work like a charm.
73! Aivars.
Ups, looks like first I send to wrong adress...