LEXINGTON, Ky. - When Friends Lake scooted across the finish line to win the Grade 1 Florida Derby, he became the best homebred runner for Mary and Chester Broman. A chestnut son of A.P. Indy and Antespend bred at the Bromans' Chestertown Farm near Babylon, N.Y., Friends Lake is the second serious challenger (Read the Footnotes is the other) for the classics this year bred in New York.