From reading the two other posts, you need DECENT directions!!!
N11 Southbound all the way, through either Blackrock or Stillorgan... doesn't make an ounce of difference. When you get to the Loughlinstown roundabout at the hospital, go straight in the direction of N11 Wexford. Take the THIRD exit off the N11 marked "Greystones/Bray/Enniskerry"
You'll come to a roundabout at the Statoil/Hills Service station. Go STRAIGHT through so that the petrol station is on your left hand side & continue down to the Boghall Road/Killarney Road junction (it has traffic lights). An odd-shaped church will be on your right hand side. Turn RIGHT onto Boghall Road & take the second turn RIGHT into the Business Park.