Details on the 2006 halloween event can be read on:
the official site (http://eu.cityofheroes.com/news/article/2857/)
paragonwiki (http://paragonwiki.com/index.php?title=Halloween_Event_2006)
Arathrael and I found out yesterday just how rediculously long it can take to get the door badges when there's only two of you so my advice is to get a nice group going so you can do it together.
(http://images.starfall.co.uk/CoH/eochai.jpg)
Eochai's easy to find and fun to take down. Jack-in-Irons only appears in L20+ zones and only after you've smacked down lots of Eochais. :)
H.A.M.S.T.E.R. and M.O.N.K.E.H. both have plenty of salvage storage space for excess halloween salvage by the way.
The contacts you can take it to for the extra costume slot are both remaining around after the event, so it's worth saving some up for future alts. :)
Ah so thats why we didn't spawn jack in Skyway City :-)
Well i suppose i will have to look in the level 20 zones for him then :-)
Think i got 3 of the badges for halloween so far need Jack and 2 other door ones on Savage and all of them on all my alts.
I'm planning on going trick or treating with tomolandry in CoV on tuesday night (will be later on as usual) if anyone wants to join me :) he/it is currently L21