Different Edit types for Add and Edit pages

According to this url:-

http://www.asprunner.com/forums/topic/11995-how-to-set-up-different-settings-for-one-field-on-the-addedit-pages/
the recommend setting to have that features is

fieldx as fieldx_readonly, ......
But I found another way to reduce adding fieldx as fieldx_readonly, .....
First of all, set the fieldx property for ADD page only (for all tables). Build it.
Copy / backup out all (tables)_add.php only to a safe place.
Enter back to the system, modify the EDIT page and rebuild the entire project.
Now overwrite (tables)_add.php with previously backup files.
Publish to your website.
Maybe this is more reasonable that keep creating fieldx_readonly fields in SQL query.
Or maybe xlinesoft is planing to create an 'Add as' in phpRunner Version 6.0?
CK