Monks,
Thanks a million for all the help. I'll be taking a
look at that regexp coach definitely.
The reason I didn't do it incrementally using a number of
if's is that I wanted to learn how to write regexes and
the best way to learn I guess is it try and do
something complex. Aiming for the sky and hitting the
ceiling effort. Once again though your generous help and attention to
detail is thoroughly appreciated.

Thanks,
Mark.