HowtoMatrix

Once I installed this extension, it took me about six seconds to create a presentation based on a directory of graphics, one slide for each graphic.

http://extensions.services.openoffice.org/node/419

Download the extension, don’t unzip it, then choose Tools > Extension Manager as always to add it.

Then choose Tools > Addons > Create Photo Album.

Read more at OpenOffice.org Training, Tips, and Ideas