I believe it is possible to import some of files inside somewhere in Photoshop files (CS3) into Photoshop CS4 files. Unfortunately, I am not able to confirm this since I have removed all of Adobe Design Premium CS3 after I upgraded to Design Premium CS4… and destroyed CS3 DVD discs.

I think I have seen some information at Adobe help online at main Adobe site a while ago. I don’t remember how I obtained the info for that matter that lead to that source. But if you need some of help on how to do so, let me or us know at the Blurb forum – right here. We’ll try to figure it out by locating that source of information on how to import some CS3 files related to PDF stuff into Photoshop CS4. Uhm, you might as well want to do a search at Adobe Photoshop CS4 and/or Adobe Bridge CS4. Although, I don’t use Bridge CS4 that much as I don’t like it and the way it does for me. It is probably just me and my preference isn’t in for Bridge CS4 at all.

At the meantime, I will take a look inside Photoshop CS4 and how it generate PDF file. Although, I use Adobe InDesign CS4 to export PDF/x-3.

Did you also import Blurb’s file of Blurb preset of handling PDF/x3 export for you? I need to take a hard look at it few times. I know it works nicely in InDesign CS4… not sure about Photoshop CS4.

At the same time, I think it would be very good for you to contact Blurb technical support for their assistance with your situation. Maybe it is something they might have overlook on that part…or are aware of it and might have assisted other Blurbarians like yourself. So, it would be good for you to contact Blurb tech support for some possible remedy. That said, I believe and trust that Blurb team would be very happy to assist and help you with this situation.

Hope that helps.
Brian {a passionately Blurbarian}