Bandil: No offense meant, but anyone asking about if it is a good idea to prepare cyanogen bromide is probably not skilled enough to do it, unless they have a really good professional fume hood. Not a home-built one, and certainly not a fan/open window. Cyanogen bromide is a lethal, volatile toxin for real. Myself, I would never use such a vile compound outside a university fume-hood.
UTFSE for cyanate from urea/carbonate.
Racemic norephedrine can be isomerized by N-acylation with benzoic anhydride, and reaction with SOCl2 to form a 5-membered oxygen/nitrogen intermediate, which upon aqueous hydrolysis yields racemic norpseudoephedrine. See J. Forens. Sci 34(4), 962-79 (1989).