Can anyone think (or let me know if it's impossible) how to do the following:

I run a script each day that builds a CSV out of our orders to be shipped and sends it to our shipping company.  I also manually print out a PDF of the sales orders and send that to them by email.  I would like to get the script to also print the PDFs and send them off.

I am able to print each order with:

nlapiPrintRecord('TRANSACTION', searchresult.getId() ,'PDF', null);

Now what I need to do is to merge the PDFs (either appending them to each other as I go along or merging them at the end) before sending them.  Otherwise i'd have to send lots of emails with a single PDF or one email with lots of different PDF attachments.  To make it easier for the shipping guys, it needs to be a single PDF attachment with all the sales orders.