In case anyone thought that PG may be playing on another artists song on this CD, allmusic.com have the musician credits listed here:
http://www.allmusic.com/cg/amg.dll
...so any further info on "what happened (etc.)" would be great. Thanks!
John
P.S. I just noticed the Allmusic link doesn't work, well, you can see it if you go to allmusic.com and choose a search for "album" and then type in "songs from the material world" and click on "search".