Thanks león.. but I heard some many stories about immigration un-accepting statements like these. They expect immigrants to move immediately and permanently, while our case (and I assume some others) is to go back home, resign our jobs and sell stuff then come back. You know, the least thing to do is to cause troubles or doubts with immigration officers after very longggggggggggg wait!
Thanks for your advice, and I will go for these companies to be in the safe side.. UPS or Canadaxa or whatever.