Is there a way to unlock PDF documents?

I know this might not the solution you're looking for, but I'll try my luck...Okular has the option to ignore any DRM-Settings of a PDF-File.

Assuming the document isn't protected against printing (in which case the print-and-scan method wouldn't work either), you can use any of the pdf converter programs that work by pretending to be a printer.

The two I've used are
  CutePDF: http://www.cutepdf.com/
  PDFCreator: http://en.pdfforge.org/pdfcreator

Of those, I prefer CutePDF - it's much faster.

Sorry to take the Accepted Answer checkmark away from ya, but I found the best solution in this eHow article. I downloaded the FreewarePDFUnlocker.msi file it mentions (I did check for viruses, everything was good), followed the simple instructions, and it worked perfectly.