Automate digital signing of PDF documents using Access 2003

I have an application that exports Access reports to a PDF file format using
conversion code from Steve Lebans. At the end of the day, a number of PDF
files exist in a "To Be Signed" folder. After the user then reviews the
reports, I would like to have a process kick off near close of day that
looks for the presence of any PDF files in the "To Be Signed" folder,
automatically applies a digital signature to each document, and moves the
signed documents to a "Signed" folder. The digital signature was created
using Adobe Acrobat and is a .pfx file. Currently, the user has to use Adobe
Acrobat's manual signing procedure to apply the signature. Does anyone know
of a way to automate this signing process using Access 2003?

One other thing I would like to do is have this automated process apply to
multiple folders under the "To Be Signed" folder and move the documents to
multiple corresponding folders under the "Signed" folder.

Thank you!

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