Pictureboard was originally recorded for the Xero tape I believe. Why is Chester on this list then? (http://repertoire.bmi.com/title.asp...61859&ShowNbr=0&ShowSeqNbr=0&querytype=WorkID)
Pictureboard has versions with Xero and Linkin Park/Hybrid Theory. As all the band members are credited by LP songs, the same goes for Chester, I guess.
Written during the Xero era, but likely never recorded by Xero. Revised and recorded after Chester joined the band just like most of their Xero material (see: Forgotten, A Place For My Head, Runaway, Slip, Blue), and performed live with Chester on at least one occasion. Will likely only see the light of day if it leaks online somehow.