The go-to Vista fix-it guy, The How-To Geek, offers a much-needed tutorial and walk-through on installing print-to-PDF functionality in Windows Vista. To start saving paper and creating PDFs, you'll need to install a copy of previously mentioned PDFCreator, but with the trick of turning off User Account Control while you install to enable its direct PDF-creating capabilities. For a simpler but much more restricted and feature-lacking solution, you could also try installing doPDF. Hit the link for some how-to wisdom. (Original doPDF post).