If you can't open the existing PPS in Normal/Edit view, then open PowerPoint
first and then File > Open (or Office button > Open in 2007) to open the PPS
file. Alternatively, you can put a link from the first PPS to the second.
--David
--
David M. Marcovitz
Author of _Powerful PowerPoint for Educators_ http://www.PowerfulPowerPoint.com/
Microsoft PowerPoint MVP
Associate Professor, Loyola University Maryland