I know you can create a PDF out of any PSD file via Photoshop.

However, is it possible to merge multiple photoshop created PDF documents into ONE multipage PDF file?

I have multipage work in Photoshop I need to convert to PDF but can't find a way to have photoshop output the PDF as multipage PDF.

Appreciate any help.

Not sure if Photoshop can do that. I just researched Google and found this free software http://site4.pdf995.com/download.html.
I guess it's worth trying.
If it won't help I suggest you to download and use Macromedia Flash Paper - very easy-to-use tool which works really fast.

Thank you:)

I shall try that software.

Still if anyone knows how to do this via Photoshop, all the better.

Appreciate it guys.

I wouldn't expect you can do that in Photoshop, because it doesn't work with multiple pages. Even when you open multiple page PDF in Photoshop, it will ask you to choose one page to be rendered.

If you have Acrobat (not the Reader), you can insert other pdf pages into existing PDF document, and save them again as a new (multiple pages) document.