Are you talking about the Hallo maps as a hole, or just the quest(s)?

The maps appear to be open to me, you just need to talk to the travel agent to trigger the script which sets the event status to "open".

If you're referring to resetting the quest, the way to do it is to add the current year to the end of the quest name. This way, even though you've completed "Holiday Spirit" (the original naming from 2010) the quest is now called "Holiday Spirit 2019". Nobody has completed the "Holiday Spirit 2019" quest yet (as it hasn't existed) so anyone can start it.

You'll likely want to do this for all the quests in the maps so that they can all be re-played. The only other quest I remember in the Hallo maps is Cat's Paw.

IIRC I added you to the daiserv commit access list a few months ago so now would be a great time to test that out. Have you done any commits to daiserv or mapwiz yet? The Halloween maps are stored on Daiserv so you'll need to svn checkout a copy of the maps.

To find the files you want to edit, walk over the NPC who gives the quest in MM mode and examine the "Lua" object inside of it. Examine it, and the "race" attribute is the filename of the quest. In the main quest's case, it's "clobber.lua". Then run /mapinfo to find the path to that script - remove the last part (the map filename) and you have the path - in this case "/events/hallo2010/". These two pieces together are the path to the script file ("/events/hallo2010/clobber.lua").

In the script file, look for "qb:AddQuest". This is the line which actually creates the quest and gives it a name. The first argument is the name of the quest ("Holiday Spirit") so you can just set that to "Holiday Spirit 2019" and it will be a brand new quest.

I've reset them, they should work but you should test them for me.

TY both Joe &  _People_ for the Hallo Reset/fix - the Hallo Event quest rewards are very unique and arguably some of the best in the game so it is nice to be able to participate in them.
The quests are reset and I got them but,
For Anon's quest he is not giving the Vial to fill with the poison so although I have the quest I can not complete it.
For the Tarrasque I did  kill it and got my reward.
Nice surprise that he can see invisibility and even bigger surprise (like, the size of the sun) when down to 15% HP or so he summoned a Golem to help him...._People_ IMO he is just a wee bit overpowered for the player who can't run through rocks and walls to spam food for instant re-heals and still required an hour to kill it.... 
Trick or treat he he

What do you think I should do to nerf the Tarrasque, Myths? Should he have less health or should I remove his special abilities? Or perhaps make his special abilities much more infrequent?

ATM he only uses his special abilities at the highest 2 level instances (level 60+ I think) so I think for lower-level players he shouldn't be too difficult.

Hi ;-)

I wonder if you didn't break Cat's Paw quest with reset (lost soul in Haunted Palace, lava chamber). I tried to do it with a low level alt and relevant corpse in swamp won't give me the required journal (corpse empty, no blue scrolling message).

Cheers 

Should be fixed now, sorry about that.