Thanks for the reply.
The thing is I have already applied for study permit, since I thought I would be going to Manitoba. I know I have to get the CAQ, but should I inform the embassy about my change of plans, since that could possibly make the process much longer? Or can I just get the study permit, and along with the CAQ, present them at the entry?
Yes, unfortunately it's going to make your process much longer. You have two options;
1. Get your study permit on the basis of University of Manitoba. Enter Canada, and simply change your school. With a valid study permit, you are legally authorized to do so.
I quote CIC website;
“I am already in Canada and have a valid study permit. I would like to change my school or program of studies. What do I need to do to modify my study permit
?If you are changing schools and/or your program of study but remain at the same level (e.g., secondary level), you do not need to modify your study permit. However, if for example you are a student at the primary school level and you are moving on to secondary school, or if you are a secondary school student and you are moving on to post-secondary studies, or if you are moving from post-secondary studies to secondary studies, you need to submit an application to modify your study permit at the Citizenship and Immigration Canada Case Processing Centre in Vegreville, Alberta
2. Just follow the normal CAQ process. And possibly you might have to defer your admission upto the next possible intake.