Zahad manipulation

I have been rereading tog and had a question

Did zahad manipulate enne to go insane? and also intended garam to find arlene pocket. He is able to see some future as seen in kell hellem's flashback so I find it hard to belive garam was able to find arlene pocket which was hidden by zahad

also did enryu know that v is inside bam, if so then who asked him to deliver the thorn?