(i would first off like to say that i am sorry for that crappy excuse for a scenario (eight) and that hopefully this one will be a lot better)
The Professional: Well, I imagine that I still have the thought process of a human. So I am going to find the nearest car/gas station and fill up some containers of fuel. This will take some time to collect enough, but hell I'm a Zed all i got is time. (Hopefully I avoid the humans long enough to make this happen.) Next I am going to start spreading it around the first couple of floors and start a fire. Since the power is out the automatic sprinklers are not going to engage and put out the fire. But, just to make sure I'll find the main power breaker and...well break it. If the building is filled with nothing but Zeds, I would hope that the other humans are aware and avoid the area altogether. Basically, I am going to allow the Zeds to burn till nothing but ash remains and the wind blows it away. This could spread to other parts of the city, but the best I can hope for is that he humans will notice the raging inferno and flee. Also, I may not be the only abnormal rager, others may still maintain human thought process but I can't risk that they don't want to infect others. So I'm going to seal the exits in any way possible. (Axes across the doors handles, tables and such as barricades)

From there I wander aimlessly around the country searching for a cure...and a human that won't kill me to help find the cure.

Zombacide: hehe..funny scenario. I think the best way to do it would be to demolish the building completely. Since this is kind of a far-fetched scenario, I'll give a farfetched answer. I would attempt to imitate a human. Upon them noticing, I run up the stairs, every floor, collecting more and more zombies. Once I get all(or as many) zombies up there on the top floor, the structure will have much more stress on it. From there, I run back and forth. With the zombies chasing me, the building will begin to sway. Back..And forth...Back...And foooorrrraaaaa! The building falls over-crushing everything inside. heh heh hah. Another, more practical plan of action would be to make a sign somehow, lure the soliders in, let them take the building down by blowing the foundation out with lots of explosive.

lilgiz:huh, well, i like this scenario, but i hate the fact that im also a zombie. well, first, i would act like a normal zombie, folowing them, and doing what they do, when i learn what they do during the day time, i would write it in a notebook and drop it out of a high window. that would probably help some other survivors. after that, i would wait till they are asleep, or whatever they do during the day. and i would take an axe to the supports at the first floor, and, when they are all inside the building, i would make the final swing, taking down the building. i wouldnt bother running, if there even is a cure, then the rotting from being a zombie will kill you once you are human again.


Residentmagnum

The rage zombies may be able to smell the gun powder and other weapons on me
They may even be able to smell zombie blood on me rather than human blood so I can go around stabbing them one by one

I would try to set fire to the building use what was available it's not like the fire department will be coming to put it out

1. Avoid being seen by all humans
2. Try not to let the others know what I was planning
3. bleach or oil if there is any around
4. rags / wicks from sheets or paper / clothing
5. candles / matches / carosine lantern oil / lighter (a lit flame)
6. I would try to make a barricade to block the others inside so there would be no escape
7. Get all or as many as i could of the goodies across the street so they don't burn

Oligocene:

I would try to destroy the bottom floor, causing the whole building to collapse. Can be done by fire or a heavy vehicle, but if I don´t have enough reason left for that, I would just pick up the nearest sharp melee weapon and start hacking the pillars (it´s not like the other zombies would understand the importance of supporting pillars in a building). Could take ages, but as stated before, a zombie has all the time in the world. If my reason is too low to use tools (only one thought left, destroy the pillars/walls), I would start using my bare hands (I don´t feel pain, I´m a zombie). Hopefully my hands would finally drop off after days of hitting the pillar, exposing my bare bones, which do far more damage. If my arms last better than the building´s walls, the plan works. If not, I should try using feet after losing both of my arms. :)

JugglaJ: Its quite obvious actually. It may take a long ass time but.........
1. Barricade any entrance
2.Find a fire axe or some other melee weapon
3.Commence skull bashing until their all dead (again) and seeing as i have no expiration date i could take them all out melee style

Hillbilly909: Since i am a zombie already this is the time to go be stupid and attack all of the other zombies JET LI STYLE!!!!!

13th.Casualty:
First off, I knock on the basement with the humans (with rythm and beat so that they know that I'm not a normal rage) and leave a note explaining my situation and my plan. Then tell them to get the hell out of Dodge.

Then, I board and barricade the building as much as I can and spraypaint the phrase "Rage Zombie Nest Inside." Then I notify the closest military organization about this nest and wait in the middle of the street with a shotgun across my lap. I go and eat a classic zombie from time to time, making sure its head was blown off so it doesn't turn rage, and once they come, I quickly point to the building. If, by some miracle, they don't shoot me, I'll try to convince them to take me with them. Hopefully, the shotgun (or other ranged weapon will convince them that I'm not a normal rage.

Then I'd help in the bashing of skulls. I'd give a soldier the shotgun and whack those rages with a...ah, what the hell, I'm a rage too. I'd take a humvee and use THAT as a weapon.