Very Urgent query

PLEASE  SOMEBODY TELL ME

 I  AM APPEARING IN MAY 11 AND HAVE COMPLETED STUDY MATERIAL OF IPCC COSTING...

SO PLEASE SUGGEST ME WILL IT BE GOOD ENOUGH IF I REVISE THE SAME STUDY MATERIAL PROBLEMS  AGAIN AND AGAIN OR SHOULD I GO FOR COMPILATION ..I HAVE COMPILATION OF PE2 BUT IT HAS SO MANY PROBLEMS I DON THINK I CAN COMPLETE THAT FULLY...PLS TELL ME WHAT SHOULD I DO

...........I need some expert advise also.......pls help