I am not sure whether you will be getting a reply from ministers or not, I sent an email to Kutta Kenney on March 1, 2011. I got an acknowledgment that I should get a reply within 10 to 30 days. But due to election, Kutta Kenney was so busy that he did have time to write me back... So, I sent him another mail one week ago and hoping to hear something this time...
Mostly people who have applied for PR @ CHC-Islamabad write emails to ministers, but as you know that we do not have enough time left and classes are going to start soon for most of us, so I would recommend that you do the same so that immigration people know that people are having issues...