Date to send docs to visa office is 15, August 2010. Can we request to extend this date for say furthr 3 months. I need this for not delaying in getting PCC;s.
Not likely. You are better off sending in the application without the PCC's and advising CIC that you have applied for them (show proof) and are still awaiting receipt. Advise them you will send them ASAP and ask them to "kindly" delay processing of your file until you are able to send them. Then hope for the best. They do NOT like granting extensions when they feel they have already given you more than enough time to obtain all of the requirements.