Thanks
Rossian: You're absolutely correct! I've seen some catastrophic PowerPoint presentations, but it is something I have to learn to do to illustrate a talk.
SRobarts: Aaah, so that's why it won't work in PP2003, I need 2007, although it seems that it should be a working feature in 2003 Version....?
Bushfiva: Thanks for all that. I'll give it a go tonight.
Thanks all - any other info is always welcome.