When the FrameMaker book has roman-numbered front-matter, followed by sequential page numbering, converted to a single PDF, a TimeSavers hypertext marker (inserted once) may also be used to set page labels, see http://www.microtype.com/ImprovePDF.html#20 for more info / sample file.
Shlomo Perets MicroType, http://www.microtype.com * ToolbarPlus Express for FrameMaker FrameMaker/Acrobat training & consulting * FrameMaker-to-Acrobat TimeSavers/Assistants Template Design, Single Sourcing, FM-to-PDF & Technical Indexing seminars