He will still be in the americain version, the song will also remain untouch.

http://dirgeofcerberus.net/fullstory...from=&ucat=36&

The gothic Japanese renaissance man--who makes music, acts, provides anime voice work, and stars in his own game in his mother country--adds his likeness to an enigmatic character in Dirge of Cerberus, as well as providing two songs for the soundtrack. We had to confirm that Gackt's contributions would remain intact for those members of the American audience looking forward to them.