I have been given a dvd by my new employers. When I mount and open it, it contains three files: autorun.inf, edisk.dat and SVOLBRO.EXE. I am assuming that it is the edisk.dat file that I should be reading but I can not open it. I have spoken to the company who say that it should contain an encrypted pdf file. I have tried copying and renaming the file to edisk.pdf and then using preview but I am getting an error message saying the preview is unable to open the file. Does anyone know how to open these types of files?