Right, he said that.
However, you didn't bother to mention it at all.
"NB" means "nota bene", or "note well".
And since a) these forums are Mac-centric, and b) there are several thousand people a day who use these forums as a source of information apart from you two, I figured it made sense to point it out.
I hope I have your retroactive permission to contribute here?
Also, the question was basically covered in the FAQ I linked to above, already.