It's a custom Greco 7-string. Here's a better picture of it from the inside of the Guitarchitecture lienr notes at http://www.guitar9.com/aghtml/image/guitarchitecturealb7.jpg
He endorsed Ibanez in the past, and I think still does.
GBT
Awwww thanks for ya great information oh rob johnson guitar he uses is sure rare brand hehehe