Changing the default chart/graph format copied from Excel pasted into Word (Office 2010)

Hi, I work with a team of users that are continually publishing reports in Word that contain charts and graphs copy and pasted from Excel into Word 2010.

We have a custom script that leverages a PDF engine to automatically convert .doc files to .PDF files that we distribute electronically to our clients. This all works great, but only if all my users select 'paste special' and Enhanced Metafile Format when adding their excel charts into our reports. Most of these people aren't tech savvy, and I'm havin ga hell of a time getting them to follow this workflow and am hoping there's a way in Office 2010 to select the default paste from excel into word when the content is a chart.

It seems like the default paste from excel is an embedded chart/graph that you can then further manipulate each component of the chart in Word; the default doesnt' paste an actual image. I am assuming the pdf renderer is using a lower resolution .PNG version of the image and when these are scaled for print and or pdf, they look like crap.

Is htere anyway I can automatically change the default paste format for the chart from excel into word to be an EMF/EMV (enhanced metafile?) Either thorugh the registry or some other saveable setting?

Thakns everyone!