Create InfoPath 2010 documents in SharePoint 2010 with SPD Workflow

• Using InfoPath 2010 designer, design and test your form
• Publish form to form library or as a content type, in my case created content type first and mapped InfoPath columns to my custom content type columns
• Click on add document and save the document as template.xml or name of your choice
• Download and save the document (template.xml) to your hard drive
• Go to View all site content -> Form Templates -> Library tab (Ribbon) -> Open with Explorer
• Copy the template.xml file here
• Go back to your Form library and change the template to something like "//formtemplates/template.xml" without quotes
• Now design your workflow and create a list item

Thats all!!