Saving completed form as read-only file-Part 2

Hi all,
After trying to put in the code for read only at PreSave, i have encountered a few more problems:
1. It seems only the 9 Pro/Extended version will show the read-only. When I open the saved/read-only file in Reader 9, the file shows empty/unfilled fields and they are editable.
2. If I want to make the saved/readonly file becomes editable, would it be best to just create a button (where you click and the form beomes editable again)?
Please provide any sugestions that might help the issues here.
Thanks.