Underfire,
Pretty amazing the understanding of flight procedures exhibited here on PPRuNe....Care to revise?
Not sure about your background. Quite knowledgeable you seem from other posts but now you've completely misunderstood. There is a difference beteende LNAV+VNAV autoflight modes and LNAV+VNAV minima. In the 737 at least you can use LNAV+VNAV autoflight modes to LNAV minima at any temperature, as long as initial, any step down and decision altitude is corrected.