Call them and ask them to add it to your reservation at CRO. Also fax it to the hotel you will be staying at no more than 4 days prior to your arrival. If you fax it earlier there is a good chance it will be lost. Put the fax to the attention of the hotels room assigner. Remember, they will only try to accomidate your first request. Don't send a list of requests because they will be ignored. Just send one request (i.e. particular building, floor, non-smoking, etc.). Also this is only a request, it does not mean they will honor it. We have had good luck on all our trips and our requests had been given to us. Hope this helps and good luck.