I use Adobe Acrobat v4 and v5. All my CAD tools can print directly to PDF (via the Acrobat PDFWriter).
I then use the Form and Link Tools so that you can descend into schematic hierarchies just like you can in the CAD, plus links to the simulations... very smooth and EVERYONE can view it with the free Adobe Reader.
Back in DOS days I DID use PostScript along with batch files to combine them. You can do some remarkable things with a PostScript-capable printer.
...Jim Thompson