It will come back on after around 50miles.
You can buy non foulers for them from Envy or a trader on my350z.com - these are not guaranteed to clear the light though, even with them in I still got the CEL but it went away after i did an ECU reset with my Digimoto software.
The brace is not needed - mine is in the garage with my standard cats
Know what you mean, when i was 17 I couldnt get insured on anything either, don't woory Ian, youll hit puberty soon, your voice broken yet?
I would think of a reply but I think Sarnie has hit the nail on the head