This should answer most of your questions, Vipco.
http://www.ifco.ie/ifco/ifcoweb.nsf/...t&type=graphic
As far as I can see the IFCO do their own classifying, however Irish censorship is very similar to UK censorship. The BBFC, for whatever reason did start accepting IFCO ratings on UK discs in 2004 providing the ratings are the same, at least on the cover.
From what I've heard the IFCO no longer ban films. Bizarre info because they just banned Murder Set Pieces. In any case you can't suddenly decide to stop banning films because there would be obvious problems.
Apparently they passed the uncut Cannibal Holocaust over there. A film which was previously banned. A surprising decision indeed considering what their VRA 1989 states.