How can I use VBA to insert a custom stamp on an existing pdf and save it? Updated

I am running MS Access 2010 and use VBA extensively.  I would like to take a model "stamp" and, based on variables, fill in fields, such as Date, Amount, etc. and insert it into a pdf file.  If possible, I would like to avoid each user having to have the adobe editor installed on his/her workstation.

Here's an update... since a limited number of users will need the capability to do this, these operators already have Adobe Acrobat XI Pro installed.  So, I will be able to interface with it to make this happen.  Does anyone have any suggestions for this?

Thanks, Eddie