21-year old Cooksey joins from Ryman League side Chesham United, where he netted four goals last season.
The midfielder also has experience in the professional game, with Colchester United and Brentford among his former clubs.
Meanwhile, Smith is to hold further talks with an unnamed Conference player.
The midfielder also has experience in the professional game, with Colchester United and Brentford among his former clubs.
Meanwhile, Smith is to hold further talks with an unnamed Conference player.