Hi Mike,
I am sorry but I do not know about the Irish regulations other than the Irish have been a lot more helpful to me than the UK Consulate / Border control etc have ever been.
My wife's friend, a Filipino, has residence in Spain and she and her husband travel to Ireland quite often but I believe she has always had a visa, which is issued free and by post I believe.
Hopefully Terpe will see your post. I am sure he will have some good advice for you.