Hi,

For changing the state of CRM opportunity automatically to a 'won' status when validating the (sales)quotation, First Inherit the sale.order model. Then super the function action_confirm. 

def action_confirm(self):
              res = super(SalesOrderInherit, self).action_confirm()
              if self.opportunity_id:
                      self.opportunity_id.action_set_won_rainbowman()
             return res

Regards

There is opportunity_id field.