Unfinished Business Kidnapping of Boo: broken quest, how to restore Minsc with console / ee-keeper?

Dear readers,

(SPOILERS AHEAD)
Minsc is in trouble: he noticed Boo is missing. We hasted back to the docks as fast as possible, but Billy the boy is not in front of the tavern. If i console him in, he instantly is removed again, no chance to talk to him or anything.

I've tried several things with setting variables before spawning Billy, etc. etc. ... nothing is working, so i have to assume something is broken somewhere deep.

As i know the quest already, i wouldn't mind to skip it and go on with adventuring. But Minc without Boo is just not viable. Is there any way by console or ee-keeper to restore him to his initial status or - better - the status he has after the quest?

Thanks for your help
Beleg