Thank you so much for taking the time to explain.
It's so much clearer how the functions work now!

I also do not use the lock device on my N900, had an issue the first time I used it back on PR1.1
I now don't know the lock code (not default) so after a reflash I left it disabled and haven't played with it until now.

Hopefully this will find the code for me.
http://talk.maemo.org/showpost.php?p=435433&postcount=5

I was expecting the app to lock the SIM too, it seems it's not the case.
Which is good as I have no idea on that PIN either.

Thanks, again.