Anthony,
PPT 2003
Insert - Slides from file - Browse for your presentation - select and open -
click insert all or select the slides you want and click insert.
Decide whether you want to keep the original formatting by checking keep
source formatting at the bottom of the dialogue.
PPT 2007
On the home tab, click New slide button, at the bottom select reuse slides,
browse for your file, click on the slides you want to insert or right click
on a thumbnail and choose insert all.
Decide whether you want to keep the original formatting by checking keep
source formatting at the bottom of the taskpane.
