you don't change to Canada license

if you plan to live there only for a week. You also don't import your car at this time. Put it into the "Goods to Follow" list and import it next time when you move there. You need to explain why you don't want to import it at this time. I guess you'll have to tell the border officer that you plan to move to Canada SOON, otherwise they may question your sincerity of immigrating to canada and deny your entry.