Is there an available module that lets you edit, add commentary/notes, and so forth?
Bible Modules cannot be edited directly in e-Sword, as Sliverhair said the only option for editing a bible module is by using e-Sword Tooltip. Silver also suggested the use of the notes editor available within e-Sword to create study notes. Both are good suggestions and I would like to add you can create commentary modules for use with e-Sword by using e-Sword Tooltip. Commentary modules once installed into e-Sword are viewed in the Commentaries window within e-Sword.