Cooke, 30, took a year out of the game for personal reasons in 2011, but has almost 300 Super League appearances under his belt.
The stand out game in his career was when he scored the winning try in Hull’s famous 2005 Challenge Cup final victory over Leeds.
Earlier this week, Doncaster held an EGM to seek funds to finance the deal, which would see Cooke take up a full time role within the Dons’ successful community development section.
Head coach Tony Miller, who originally called the meeting, said: “Paul would be a revelation for the club and would bring a tremendous level of experience and skill with him.
“He’s an honest bloke, he freely admits that he has made mistakes in the game, but he has got his life back on track and wants to put something back into the game.
“The response to the meeting has been fantastic and our fans and supporters have showed great promise with the pledges they have made so far.
“However large or small, any donation you make to the squadbuilder scheme will be greatly appreciated and can have a significant impact on the club’s ability to sign Paul Cooke.”
The club has stated it is not willing to break its pay structure to sign Cooke, who has scored more than 1100 for Hull, Hull KR and Wakefield in his career.