ALBUQUERQUE, NM— Dave Bosio, 20, an aspiring singer-songwriter who plays guitar on the streets of Albuquerque, dreams of one day playing for spare change on the streets of Paris. "To play on the Champs-Elysées, that'd be a dream come true," Bosio said Monday. "Or someplace along the Left Bank. That'd be so much better than Copper Avenue." Bosio then launched into an off-key version of Bob Marley's "Redemption Song."