to be honest its the best step to send in your police clearance with your application because if you do that u dnt have to wait 6 months after first stage approval to get second stage approval...like other people did who are telling you that they will do it them self.....because i have seen all 2011 applicants here who sent in their clearance with the application and medicals as well they dint have to wait for 2nd stage because they checked and did all their work of processing those docs while processing your 1st stage,,,,,so if u did wait and are sending everything with your file your 1st and 2nd stage will get approved the same day ...but this is only if you are filing -in Canada
i have seen all the applicants in 2011 who did this got their 1st and 2 stages the same day..and then just wait they will call u for landing interview nd then u get pr same day.....
so wait and send both your clearance in the same time as your application....go to 2011 inland application and you will find out...