They have not won the RWC at all up to 17/09/2011
They have played 7 times
10
Three
Ireland have won 7 times out of 7 meetings against the USA
99
twice
3
all six times
Ireland is approximately 84,421 square kilometers in size, while New Zealand is approximately 268,021 square kilometers. Therefore, Ireland would fit into New Zealand about 3 times.
Twice. In 1987 and in 2011.
Up to 2011, Ireland and France have contested 89 rugby matches. France have won 55 matches. Ireland have won 29 matches. There have been 5 drawn matches.
Ireland has many rugby teams. However, what you are probably referring to is why there is not a Republic of Ireland and a Northern Ireland team. The reason is that, like many sports in Ireland, rugby is played on an all-Ireland basis and there one organisation that looks after it, the Irish Rugby Football Union, and so there is one international team.