Constructors title question

OK, I've been wondering, since there is a good chance that The drivers and constructors championships could go to two different teams.

If McLaren Wins the constructors, and Alonso has won the Drivers, who gets #'s 1 and 2 next year? Alonso gets #1, and Fisi gets #2 by default? Even though another TEAM got more combined points than those 2? Or does Alonso get #1, McL 2 and 3, and the other Renault 4? That wouldn't make much sense, but it would also seem kinda goofy for McL to get 3 and 4, even though they won the Constructors title this year.

Can any F1 experts help me on that one?