[development] access api module from contemplate

Hi everybody, i´m trying to access to a module api (specifically the currency module: http://drupal.org/project/currency) The problem is that i´m trying to access to the currency_exchange() function from the content template for a type of content (the producto one). Is it possible? Any suggestion to do this? thanks a lot in advance. -- Alejandro Moreno López Publicidad en Buscadores y Marketing Online http://www.tdo.es