I had an earlier post about creating a PDF Portfolio, but have come full circle with the scope of the project and realize I am struggling with determining a good starting place and method for some basic PDF manipulation with PowerBuilder.  

I am looking for some guidance on a good way to implement this project.  It might be best to layout the scope of the project and ask if anyone has suggestions on the best way and 3rd party applications to use to accomplish this.

Scope:  Create an application that will allow users to navigate through a list of Windows File system folders.  Each of these folders will contain various documents (Word, Excel, PowerPoint, Email, PDF, etc.).  The user will be able to select documents from the selected folder and then provide an output filename and location.  The output file will convert all documents selected into PDF's, then combine all those PDF's into one PDF file.

I have all the code working up to the point where I need to covert the random file types into PDF.  I also have a working installation of PDFTK that will combine all the PDF files into one large file and place in the desired location.

My roadblock is the conversion of the random file types into PDF's so I can join them.  I have tried to implement Amyuni's PDF convertor.  I can get it to work with existing PDF files, but don't seem to be able to get it to open other file types and convert to PDF.  I think I have landed on the fact that the software is only for working with existing PDF files and not other formats.  

This is where I could use the guidance.  Can this be done with Amyuni's external functions?  I just can't seem to find good documentation for a PowerBuilder implementation using Amyuni.  There are several DLL's I have tried working with and just keep hitting a wall on understanding which methods to use or if it is even the correct action to be taking.

Any insight or help would be greatly appreciated.

Rick