Thankyou to all those who posted comments to ciold wx procedures.
My view.
Regulatory authorities need to define the cutoff for cold wx ops and apply procedures notified on ATIS or by ATC. Lets asume a cutoff of ISA-15. ATIS will state ILS approach 36R cold wx procedures in force. Same process as applies to Cat II/III. Pilots select specially modified cold wx ILS procedure for that runway from the database or printed Jeppesen chart. This will contain higher FAF and crossing alts and minima. Radar will modify descent alts initially to maintain terrain clearance up to the FAF then the ILS is like any other ILS.
The nature of the altimeter corrections means that the approach profile might exceed 1000fpm rate of descent. Especially for some non precision approaches. Further onboard databases would become substantially larger. The new FMS2 Pegacus on Airbus aircraft has the extra capacity but older databases do not. The advantage of having the procedure in the database means a managed approach can be flown with Airbus aircraft. The procedure being ATC initiated means that all inbound flights will be flying the same profiles.