Originally Posted by
cityflyer369
I am not sure if changing the FF number is possible with an award ticket, but I do not think that this is necessary anyway.
The OP wants ot use the SkyTeam Elite additional baggage allowance. This can probably be accomplished by showing the card at check in, but it can save arguments to do OLCI and have the computer show the number of bags that are free. (I don't know whether this works for all SkyTeam carriers, but it is slick on DL.)
Another reason for wanting the elite FF number attached to the PNR is IROPs. Most carrriers treat alliance elites slightly better when things go wrong.