Found how to create a left column/side-bar only, and a left and right column/side-bar together - but was unable to find how to create a right column/side-bar only.
Any help is most appreciated.
For right side-bar only, have a go with:
<!-- insert your right column code here, you can use PHP tags -->
CSS has of course come on a long way since the above were first posted! I'll work out the best way to re-do these into HTML5/CSS3...
Thank you once again for your stellar support!