Originally Posted by DannyD
seams like many people add some of the extract in the begining of the boil and then the rest at about 20 min?
This is what I do. It takes a while to get all of the extract to dissolve so I wait until about the last 15 minutes to put it in. With a stout, darkening the wort is less of a concern than with other styles. But you may want to have about half in the boil. You could try adding all of the extract at the end and working with a hop tea until then, but I've never done this.