Nfldraftscout.com says projected 7th to FA with the highest possible being the 5th round.
http://www.nfldraftscout.com/ratings...2010&genpos=qb
Walter's football says 7 to FA
http://walterfootball.com/draft2010QB.php
He didn't get to play in the Senior bowl or even the Shrine Bowl, only the Texas VS Nation Bowl. He played ok in that game, but did not blow scouts away.
He would have to have a heck of Combine and Pro Day to get him any higher than a 5th.