One of Powerpoint’s failings is that you can’t get it to add a folder of pictures automatically (like you can with PhotoStory). Well, actually you CAN if you use a cleverly developed macro that asks you where your pics are and creates a new slide for each one as well as resizing each image automatically. What used to take hours now takes minutes! This is SO good that you might be tempted to keep it to yourself! Read on ….
BEFORE YOU START
right click this link and ‘Save Target As ..’ to download the blank Powerpoint http://blog.midchesh.ac.uk/coolstuff/wp-content/uploads/2009/09/getpix-blank.ppt
check your macro security settings
this procedure uses a macro. The macro won’t run if your security settings are too high. Here’s what to do. Open Powerpoint. From the menubar select Tools > Macro > Security. Set the Security Level to Medium. This setting asks you if it’s OK to run a macro whenever one is encountered. (On the first occasion that you change this setting you will need to close Powerpoint then reopen it for the changed setting to take effect.)

OPEN THE ’GetPix’ POWERPOINT
When you open the GetPix Powerpoint a Security Warning will pop up which tells you that your Powerpoint contains a macro, click Enable Macros.

From the menubar choose Tools > Macro > Macros
Ensure that GetPix is selected and click Run

You are now prompted to enter a pathname of the folder which contains your images. You need to end the pathname with a forward slash – e.g. C:\Myphotos\London/ (note: if using a Mac end with a : )

the macro will run and report the number of files in the specified folder and the number of slides added (if the file count is greater than the slides added it will be because the folder contains some ‘non-image’ files). Click OK to complete the procedure.

If you need to add files from another folder just run the macro again. The first slide can be deleted – you can now make ANY changes that you like to your Powerpoint (change the slide order – insert text boxes – resize images – delete unwanted slides - insert slides etc).

NB – don’t overwrite the GetPix Powerpoint with your new presentation. Use ‘Save as’ and save the new show with a different name. GetPix will then be available to be used again.
(The opening slide of GetPix Powerpoint contains a summary of these instructions and gives credit to the writers of this macro. They are also credited below. If you follow the link and download the macro code and instructions please be aware that there were 3 errors that needed correcting before the macro would compile for me. Contact acarr@midchesh.ac.uk if you want details.)
Source: ‘A Simple Method for Importing Multiple Image Files into PowerPoint’ (Chris Sistrom & Janice Honeyman-Buck)