Yeah, that didn't work. I've been getting some old-skooling on btintra.unix and I think the problem is that the binary needs quotation marks rather than backslashes ... Still have some work to do to get it there but at least I'm not stuck anymore.
Also worth noting that I've discovered putting "set -x" at the top of the script is a god-send ... ;)
Cheers, Greg.
Peter.