Q. Wise Oracle, what will Roadie 42 bring to Argentina? He said: "Sorry Marguerite, I'll bring it to Argentina". I don't understand.

Thank you!

If you look at Anchorman's live photo blogs you will see pictures taken of various signs that are put up at venues. These vary but tend to show either directions (complete with arrows) to catering, dressing rooms and stage etc, or they let you know where you are. Marguerite is the Production Assistant on tour and those signs are created by her to aid the entire crew.
Roadie #42 took one of the 'Everything this way' signs and that is why he promises to return it though I suspect he's joking as I'm sure Marguerite can rustle up another.