Hi Monnie-
I just got wind that this forum was out here so let be reply nearly 5 years later.  You would follow SDLC practices and make changes in the Development environment, test them promote to the Test environment before promoting to Production:

1. Go into the Admintools application for QAD EQMS (your normal url with /admintools - you will need to have admin tools security granted to you by your admin)
2. Select AppXtender
3. Select Process Search
4. Search for the Process/screen you want to add the field to, in your case "Project Tasks Library"
5. Select "Fields" from the "Structure" menu on the left
6. If the Process is not already extended, extend it with the slider in the top right. (If it is already extended, do not change it or your extensions could be removed)
7. Add the field you want, choose the field type you want ("text"?)
8. Finish any required settings
9. Save
10. Publish
11. Test