To add a slide with a different layout : Introduction « Introduction « Microsoft Office PowerPoint 2007 Tutorial

1. Microsoft Office PowerPoint 2007 Tutorial
2. Introduction
3. Introduction

On the Home ribbon, click the down-arrow next to New Slide.
       Click to select the slide layout. 
       Your choices include Title Slide, Title and Content, Section Header, 
       Two Content, Comparison, Title Only, Blank, Content with Caption, and Picture with Caption.

PowerPoint adds your new slide after the current slide.

1.1.Introduction
	1.1.1.	Starting PowerPoint
	1.1.2.	Create a program shortcut from the Start menu to the desktop
	1.1.3.	Choose a Command from the Office Menu
	1.1.4.	Choose a Command from a Shortcut Menu
	1.1.5.	Diagnose and Repair Problems
	1.1.6.	Get PowerPoint Updates on the Web
	1.1.7.	Close a Presentation
	1.1.8.	Quit PowerPoint
	1.1.9.	Start User-Initiated Safe Mode
	1.1.10.	To add a slide with a different layout
	1.1.11.	Setting General PowerPoint Options
	1.1.12.	Change Advanced Options
	1.1.13.	Add a Language to Office Programs
	1.1.14.	Set Developer Options