Change module's weight - by module or manualy
Since it was explicitly asked, there is also a module, Modules weight, that performs this task as well.


  We always need to modify modules execution order, and some could write
  a code that execute a query to modify the weight of a module in system
  table, some might go straight to his favorite SQL client and modfiy
  the record directly, This module provide admin interface for
  users/people has the access to modules page to reorder the module
  weights as they want