Well once you wife will have CSQ from Quebec then your file will be sent to MICC and they are the final authority to approve your sponsorship, in case if they havnt approved it yet. Then your file will be sent to Rome and they will take their time to give PR visa to your wife. I hope all will go well for your guys and you will be in Montreal by March 2008 as you wish and plan. In the meantime, have a look at the following website pages which will tell you how much time they are taking in Canada and in Rome to finalise the cases for sponsorship.
http://www.cic.gc.ca/english/information/times/canada/process-in.asp#sponsorshiphttp://www.cic.gc.ca/english/information/times/international/05-fc-spouses.asp#europe