Re: PDF in director

Yes. PDF Xtra is fine too. Its older, slower, lacks some of Impressario's features (alpha channels, etc), but does the job.
Another, quite different approach is to use Directors built in support for SWF. In other words to convert the PDF to an SWF file.
Macromedia used to produce FlashPaper as a simple alternative to PDF. I'm not sure if Adobe still do that, though I'm sure you could find it online somewhere. Anyway, there are a few tools which convert PDF to SWF. The simplest option and the cheapest (free) is to use the online converter PDFMeNot. This service allows you to upload a pdf and it will be converted to an online SWF. I say "online", so how do we download it, you may ask. Well heres the nifty bit:
In Firefox, choose Tools - Page Info . Click on the Media tab and select the file with the SWF extension. Simply save it to your computer and import it into Director. The SWF file has a built in zoom slider, page turn buttons, a page counter and more.
I still prefer PDF, but heck, this is quick, free and it works.

Moshe