There are lots of methods, each with their own advantages. One of the
methods that re-uses the same slide is better if the slide is going to
be changed a lot. Copy and pasting to the end is the height of
simplicity as long as you don't need to make a lot of changes. Doing
that will take about 15 seconds whereas setting up a custom show will
take several minutes to set up. Pick whatever works best for your
particular situation.
--
David Marcovitz
Microsoft PowerPoint MVP
Author of _Powerful PowerPoint for Educators_
http://www.PowerfulPowerPoint.com/