Wed 01 Jan 2007President says time for NI deal limitedAgreement between the parties on policing and powersharing would represent a momentous step for both communities in the North, President Mary McAleese said yesterday, but the opportunity was "time-limited".Speaking in Áras an Úachtaráin at the presentation of new year's greetings by diplomats from 55 countries, Mrs McAleese touched on international topics before turning to Northern Ireland.