Papa Roach managed to outlast the rap-metal boom of the early part of this decade, in part by dropping the rap. On the band's sixth album, the rap's still gone, but the fake metal hooks are in full effect. Hard-riffing and accessible, Metamorphosis boasts several grimy-catchy songs that recall the dude rock currently on the airwaves. Notable tracks include the dewy-eyed slow one "Carry Me" and "I...