uUK company Irish VAT


We are a UK company with a few customers in the Republic of Ireland and for one customer we have been persuaded to register for Irish VAT

I have not yet received a number or information pack, but in the meantime I am looking for advise

Firstly do I need to set up a seperate company in Sage

If not what tax code do I use and will it appear on a seperate report for me to (I do not know how yet) do an Irish VAT return and pay to ROI customs and Excise?

Any help at all will be most appreciated