Guys,
I checked with the event host organization
(AMIPCI).
Here's what we must do:
Once you have your baggage and exit customs, you
will see
some booths that are identified as "Servicio de
Taxi autorizado".
You tell them your destination, pre-pay the trip
and walk outside.
You then look for the taxi rank (it is identified
and the cabs are
painted yellow and white, with graphics depicting a
plane on
the doors.
You should be careful, when pre-paying the
fare, to specify that
you want to go to the "Hotel Sheraton Centro
Historico, frente a
la Alameda Central" (because there are three
Sheratons in the city).
Hope this helps, regards
Tony Harris