Printing PDF from I5 to Network fax

Question

I need to take a spool file from an iSeries printer and send it to a Windows networked fax driver. The fax is setup as a shared printer, and I have no problems getting the spool file and the destination fax number from the i5 to Windows. The question is how can I pragmatically interface with the fax driver to provide the information (fax number ext...) to get so that it will not prompt the user for the user for this information?

I have interfaces to the spool in both Java and C#, I'm guessing C# is going to be the better way to go. The solution will reside on a Windows 2003 server. Is there any possibility of using server 2003's built in fax services to help with this?

I'm stumped so any nudge in the right direction would be appreciated.

Thanks!