If you don't have 2007, then one of the easiest to use .pdf file creators is
probably PDFCreator from SourceForge: http://sourceforge.net/projects/pdfcreator/ it installs as a virtual printer
on your system and when you wish to create a .pdf file you simply print to
that virtual printer. Instead of a sheet of paper, you get a .pdf file.
Of course, instead of a free solution, you can always actually purchase
Adobe Acrobat <g>.