"I'm absolutely delighted to have a player of that calibre at the football club and for it all to come to fruition," he said. "He's got a big, big part to play and he is desperate to score goals.
"You only need to look and see he has been a top-class player all his days, at the very highest level.
"But I did my homework, and what I was really taken by when I sat down with Andrew and spoke to him was his hunger and desire.
"He still wants to show people he can play and score goals. He has bought into what we are trying to do and I'm delighted he was of the same mindset."
He added: "He will bring absolute top-class pedigree football, all-round awareness, and he will bring goals. I've no doubt about that.
"The lads we have got have been magnificent and Andrew joining us will just develop and help that.
"Everyone can obviously learn a lot from him."