If you drop a regular button on the form and make it a submit button. In teh Submit panel you can control what is being submitted. One of the options is a PDF and another is an XDP (XML Data Package) where you can control what is in th epackage. One of the options for the package is the completed PDF (base64 encoded). If you use the XDP option you will get all of your data in XML and you will get the completed PDF in a separate node. I believe the node is Chunk. Then you can get the Chunk node an decode it and voila there is your data and completed PDF in a single transmission.