CodeExtinguisher 2.0 Release Candidate 14.2

[eluser]got 2 doodle[/eluser]
I am working on an application that will require one super user (me) and members who can have access to manage their own data. Since I don't want to re-invent the wheel I wonder if anyone could give me some strategic direction on how best to accomplish this with CodeExtinguisher.

I see that a user access level is part of the system already, with predefined access levels set in config/access_levels.php.

I assume that I will have to test the access_level of the user logging in, but where is it best to do this? And what functionality is already built into Codex for this scenario.

any idea what

Code:

$config['codex_trust_mode']         = "true";

is on line 26 of config/codex.php?

Any help would be much appreciated, especially if accompanied with code examples.

Thanks,
doodle