Thanks, bb.. you're a star. Now for the "fun experiment" bit...

I'm also keen to get Matmatic working on my Mac -- which is right back where I started with all this --in May, I think!

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)