the Data Assist wizard is found at WebAssist -> Database -> Create Data Assist pages
in the security assist wizard, you need to tell it to put the pages in t a subdirectory. for example, to create the login page in a subdirectory of your site named admin, go to the manage pages tab. In the list of pages, select the login page and change the location from:
login.php
to:
admin/login.php
do the same for the other pages to be created.