Go to Tasks > Submittals > Submittal Worksheet
Click on Add/Remove Packages to adjust the Cost Codes that will be used for your Submittals
Click on items and move to the right to add and to the left to remove. Click Save Package Changes
Yes, after a few months we finally found the answer. Sadly, Mike is on vacations right now so I'm afraid we are not able to provide the answer at this point.
Video Tutorial for Creating Submittals