|Take a look at the same link for Omana Hi-Low: http://en.wikipedia.org/wiki/Omaha_hold_%27em|
Basically, play the same way without playing low hands. Instead of playing, for instance, an AA23 double suited, you'd look more towards the way of AAKK double suited. Only high hands apply here, so don't worry about the low hands connecting. Don't bet much on low straight draws, two pairs, and sometimes even 3 of a kind. Look more for a full house, straight, flush, etc.
The fourth WC you will come across, finish in the top 600 out of 2700.
* For a quicker way to achieve this, please read "Main Event Win."