I needed to make a powerpoint of 100 pictures and figured there had to be a way to do this quickly. In Powerpoint 2007 all you have to do is click “Insert” and then click “Photo Album”. You can then choose the directory, select all the pictures you want (Ctrl+A will do this quickly) and then click to create the powerpoint. This creates one slide per picture and even resizes your pictures for you. This saved me close to an hour of creating slides and inserting pictures one by one. You can do this in older versions but you have to download a plugin to get it to work.