To get accurate prints my Color Management and i1XTreme articles discuss how you have to disable color management in Photoshop when creating and user paper profiles. This is critical to the success of this process!
In addition, my article for Epson Exhibition Fiber has directions that are valid for Photoshop CS4 and earlier, but CS5 needs the following tool to get accurate results when using paper profiles:
The reason why this is required is because Photoshop CS5 removed the no color management option and has added some changes which may cause undesirable results.
There is no action required for Lightroom or Photoshop CS4 or less users. ColorByte ImagePrint users are not impacted either.