How do you stop Greg from playing twisted wizard

first you chase Manny through the school just so you can get in the school then OUTSIDE by the school on the RIGHT there is a tree climb up the tree on the RIGHT and you will find the #s 9,37,15 on a sheet of paper then go back inside the school & run your mouse along the set of lockers on the bottom floor in the school then open the locker using the #s on the paper and u will find a manual take that manual back to Greg and that will get him to stop playing twisted wizard.