In an interview Linkin Parks vocalist Mike Shinoda stated that there is a special edition out there of their third album which has him singing in songs that Chester sung for the final draft of the record. I've searched the internet and found a special edition that had no mention of bonus tracks with Mikes vocals, is there more then one special edition ?
http://www.youtube.com/watch?v=l4hPE48PbL8&feature=related
That's the interview with that special edition mentioned