I've just submitted v2.0.0 of the plugin for review. This version:
  • Supports Zen Cart 1.5.4 and 1.5.5[a] only.
  • Minimizes the changes to the ZC-specific /YOUR_ADMIN/orders.php (no more comment-out block), making it easier to incorporate into already-edited files.
  • Recognizes that some callers might have previously "prepared" the commentary input (i.e. adding slashes).
  • Moves the database initialization to a "more proper" admin-level initialization script.