Cork Week is one of Ireland's biggest sailing events since its inception in 1978. It is a biennial regatta and will run from 7th - 13th July, 2012 Enter Website
IODAI has published some advice on moving to the main fleet here. It should be noted that, from a Royal Cork Optimist perspective, there is less of a necessity to spend a lot of time in the national regatta fleet because of the availability of good local racing on a regular basis.
Anybody who is trying to rig an Optimist for the first time will find it a daunting task with so many different bits of string. Paul Tingle as prepared an excellent beginners guide to rigging an Optimist, complete with pictures here