OK, here we go - your chance to win two tickets to the Giants-Eagles game on Dec. 7 in the first installment of The Blue Screen's Eli Manning Trivia contest. In case you missed the details when we announced them yesterday, here they are again: Below, you will find three Eli Manning-related trivia questions. If you know the right answer (or if you have a guess), e-mail the answers to The Blue Screen at EliTrivia@aol.com. Don't post them here, and don't e-mail them to me at the Daily News. The