No, there is no absolute step by step tutorial, such a tutorial would be massive due to number of permutations that can be used in security assist.
What specifically are you having trouble with?
The Security Assist Wizard is really quite simple, but the pages that can be created are quite varied
on the initial screen, you select your database connection, if you wish to use one of the presets, you can select one, or you can use your own table structure.
you also specify the ID column, this is used to identify the logged in user.
on the manage pages tab you can edit the field settings for each column in your users table to set the different validation options.
you can also select which pages to be created.