🚀 go-pugleaf

Nothing wrong in Post#22.

a) Convert everything from RGB to CMYK by PhS.
   Keep the CMYK profile in mind, but don't embed
   it in each image (it can be fairly large).
   Export to PDF, preferably as PDF/X-1a with the
   Profile as Output Intent, embedded once.
   An Output Intent is used for the preview and as
   an information. It not used for converting
   the images into any other space.
b) Keep everything in your RGB space and embed the
   profile in each image. These profiles are small.
   Convert all RGB images by Acrobat Pro into CMYK,
   assign this profile as Output Intent and embed
   it in the PDF once. Save As by old or new name.

It would be really surprising, if Acrobat 9 shouldn't
offer something like page 7 here:
 <http://www.fho-emden.de/~hoffmann/colpdf27022008.pdf>
Perhaps this information was missing:
An ICC color space refers to an image with assigned
ICC profile. Otherwise it's a Device Color space,
which means, that each device would interpret the
numbers somewhat different.
An available output intent is directly indicated (in CS2).

Best regards --Gernot Hoffmann