I have a little bit of a different problem.
We have multiple Form Libraries that are using the same form template (when a change is made, the form is published out to multiple form libraries ... one library in each region's SP site). Everything looks to work okay, but the filenaming conventions are inconsistent. Since there's multiple locations where the file is saved, I would like to determine the filename, but not really worry about the file location ... The users are trained to go to the Form Library and click New, fill out the form, and then click Save so they can deal with that. I can't figure out how to do this through the data connections to say "wherever you want to save it is fine, but how about using this filename". My preference is to just have the File Save dialog box appears (as by default it has the correct location) and override the Name field with a default value. Ideas?