Can I customize an InfoPath Flexi-Task form with our InfoPath template data?

We have a deliverable to provide InfoPath buttons on our InfoPath form to control the Flexi-Task outcomes from Nintex.  

1. From the Flexi-Task configuration ribbon, I have tried using the 'Edit Task Form' to 'Edit with Microsoft InfoPath 2010'.
2. I am able to save this custom InfoPath Flexi-Task approval form and edit in InfoPath Designer 2010
3. I would like to merge our InfoPath template with the required Decisions and Comments fields from Nintex
4. The plan is to publish this to the proper default publish path that Nintex created i.e.
   [YOUR SHAREPOINT SITE]/NintexWorkflows/[NAME OF WORKFLOW]/Flexi_Task_2442d115c79f44b0b5a505038236193d - Working.xsn

Q. Can I take our InfoPath template form, then “merge” in the data connections and publish to the Nintex form library with our own *.xsn file