It is worth trying these utilities before reying on them for output, some of the free ones I tried changed colour models so cmyk became rgb in the pdf and of course that leads to s colour shift when printed. CutePDF does not change and that is my one of preference although you will need Ghostscript.
Printing to a virtual printer does offer some advantages over ‘publishing to pdf’ within a programme ie in Corel Draw you can now use all the features in print preview ie pr-separate, step and repeat – add marks etc. it also will simplify some transparencies and files will be smaller than ‘publish’. just as another tip – under the ‘postscript’ tab deselect download Type 1 fonts and convert Truetype to Type 1 and then all text will be converted to curves when you print.
Most printers to pdf will have a size restriction of just over 5m where Corel’s publish does not. some of the READERS also cannot display much over 5m (I forget the exact size limitation) Adobe reader is one of them but something like Nitro and I think Foxit will display fine.
Alan D