For anybody thats interested here is a link to the Kentaro website where it states
Republic of Ireland
The Republic of Ireland have signed a long-term agreement with Kentaro, who will also organise glamour friendly matches of Giovanni Trapattoni´s men against Brazil and Argentina in 2010.
I would make a fair guess that this is the third party that the FAI are talking about.
http://www.kentarogroup.com/index.php?id=35
It seems totally reasonable to me that the FAI sign an agreement with a sports management agency to organise friendly games in order to maximise the profits from any such games. It also seems totally reasonable the such a company would request a clause in any contract signed that
any games the FAI wish to organise (and I would take it that also includes the clubs involved in the league the FAI administer) over a certain capacity would have to be organised through them otherwise whats the point in signing an agreement.