As Executable As Possible

I am trying to make my database as secure as possible so I can sell the application I have written. Certian things are stored in a table to make the application unique to the buyer to hopefully stop free distribution.

So I need to make sure that the user cannot acces the tables and make changes to them other than via the front end.

I have a password protected backend but the users can still edit the contents of the table via the front end.

Not sure if this is the easiest way but I am considering the following:

I want to open the main form when the database is opened, and then close the whole access application when the main form is closed.

Also, is there a way to change the text in the Top Bar that says Microsoft Access to something else plus change the Tab Name on the Windows Program selection bar at the bottom of the screen.

Would using the Access Developer Extensions be the best answer to my problem??

http://msdn.microsoft.com/office/technologyinfo/devtools/accessextensions/default.aspx

Has anyone used these?