I don't think "adobe pdf" will appear in the list of printers unless
Adobe Acrobat is installed.
People who don't have Adobe Acrobat can still follow Karolien's steps
using a different PDF driver. I use Pdf995 - it works well and is
free. Download and install the Pdf995 Printer Driver and the
converter from:
http://www.pdf995.com/download.html
To convert a presentation, print it and select PDF995 as the printer.
--
Tim Hards
http://timhards.com/
Chief Software Architect
Perspector - 3D Business Graphics for PowerPoint
http://perspector.com/