The general idea is that you insert section breaks around the portion of your document that constitutes your form-in other words, put one just before your first form control and one just after your last form control. This is possible, and Word makes it relatively easy to do.
What she would like is a way for the form to be 'fillable' while leaving the rest of the document available for editing.
She can use document protection (via the Restrict Editing task pane) to allow filling in forms, but that makes the rest of the document uneditable. Corrine has a form that she created in a document.