What'dah go and do that for? The foam looks pretty dry in the pics. If I were you I'd just put everything back the way you found it.
Seriously . . . What I would do (now that you screwed everything up . . . just kidding) is to pour new foam 2 or 4 lb and fill up the cavity. After it dry's . . . Then take a hand saw and cut the overflow off (so that the foam is level with the tops of the stringer sides . . . Then laminate about 6 layers of 1808 over the tops and about 4 to 6 inches down each side. That way you have no voids or air pockets in the stringers.
That's what I would do.