You could also give Jackie Simoud a phone at the Blue Ice Explorer Cafe in Narsarsuaq. He is one of the major outfitters with a plethora of boats to get you around and he has acquired the hostel in Igaliku too. His rates are also very reasonable. His website is
here.
I would also state that Greenland is quite a demanding place! You do need to be reasonably fit and fairly well-equipped. As some of my colleagues put it, "Greenland eats **** gear".
The main reason for my visits over the past several years has not been fishing but I have managed some and you can read a wee bit of what I posted about on Sexyloops
here. Some more general advice too!
Good luck with it - you'll have a great time!
Andy