Build 4204 of Cardbox 3.0 lets you import PDF documents as multi-page images into Cardbox. You need to download and install the separate Ghostscript package in order to be able to do this: see http://www.cardbox.com/support/kb/importPDF.htm for full instructions.
Some minor bugs have also been corrected. You can find details of all the changes at http://www.cardbox.com/support/clientHistory.htm.
To upgrade to Build 4204 of Cardbox 3.0, go to http://www.cardbox.com/downloading/updates.htm and follow the instructions.