There are a whole lot of pdf creation programs out there on the web (google for [freeware pdf (writer OR printer)].
Prices range from $30 to $100 or so, but all cheaper than Acrobat's very expensive Distiller. Easiest (and least flexible) are those that just install as a printer driver.
I hear good things about pdf995 from
http://www.pdf995.com/ and at $9.95 for the plain printer driver it's hard to beat the price.
I use an old freebie Adobe PDFwriter printer driver that came with some Adobe Lite software that came with a scanner that works well enough so I haven't tried it.
[And there's Ghostscript if you want to go that route]