Temp correction for ALL approaches??

[NO LAND 3]

Thanks for a good discussion guys.
My companys SOPs are similar to Eckhards: We cannot use VNAV (ie instead we use use V/S or FPA) if any altitude modifications are made to the LEGS page at or beyond the FAF.
I wish we only had the the Boeing 777 FCTM to consult but our FOM lays out our VNAV approach validation procedure and prohibits ANY lateral or vertical modification at/after the FAF. A cynic might question whether the person who wrote it really knew their stuff but hey...
Our current (though constantly changing!) fashion is to only adjust DA/MDA and eng out accel alts from 0 down to -15C degrees OAT at airfield (if no published min temp) and then all altitudes when colder than that.

Conveniently we can still use LNAV/VNAV most of the time as it is unusual (for most of our destinations) to get below - 15C.