Found this.
Landing in Montreal without a CSQ
http://www.settlement.org/discuss/topic.asp?TOPIC_ID=7212
According to CIC, if you do not have a Certificat de Selection (CSQ) or proof of onward transportation out of Quebec, you will most likely have difficulties in "landing" there. The main problem is that this decision is at the discretion of immigration officials at the port of entry in Quebec. If you have indicated a non-Quebec destination but try to land in Quebec, you might have problems at the border, since Quebec has the provincial authority to choose its own immigrants, and has a somewhat different immigration process.
Again, if you do have to land in Quebec without a CSQ, you should be able to show that you are continuing on to a destination outside Quebec.