This should help:
http://childrenofthecorn.20m.com/cotc5.htm
Body Count (possible spoilers)
1.Farmer: Hit by lightning.
2.Farmer’s wife: Mutilated by several corn kids.
3.Charlotte: Slashed across face with sickle, then hacked up with sickle.
4.Lazlo: Impaled on scythe, decapitated with axe.
5.Kir: Leaps into silo fire.
6.Fireman: Set on fire by silo fire.
7.Fireman 2: Set on fire by silo fire.
8.Luke: Head magically split open, small demon pops out.
9.Sherrif Skaggs: Hole burned in head by demon from Luke’s head.
10.Deputy Earl: Throat slashed, then stabbed in stomach.
11.Corn kid: Blasted with shotgun.
12.Corn girl: Hit over head with baseball bat.
13.Jacob: Beaten, hung by wrists in barn, then stabbed in stomach.
14.Tyrus: Throat slashed with shears.
15.Zane: Smacked with a plank, falls off of ledge onto spikes.
16.Greg: Drill in leg, then blows himself up with gasoline and blowtorch.
17.Ezeekial: Hand stabbed with hook, thrown into silo fire.

The Policeman:
His name was Sheriff Skaggs
Deputy policeman
His name was Deputy Earl
Greg
One of the 2 kids was Jarod (He had a torch)
Eight divided by one-half equals four squared!

Any reason why Kurt/Curt wanted to commit suicide?
CHD Petition:
http://www.gopetition.com/online/16298.html

Kir use to go out with Curt/Kurt, the friend that killed himself by bungee jumping. She was devistated by the loss and even more so that he would leave her by committing suicide. Also, when Zane is talking to her about losing a loved one she breaks down into tears. When she goes to sacrifice herself after reading the book that Jacob gave to Allison she tells the children this
Eezekiel: And what is your purpose?
Kir: To reject the world of the aged before I reach the age of sin, and to join He Who Walks Behind the Rows because Curt/Kurt is waiting there for me.
Eezekiel: Come with us beautiful child for today shall be your day.
"A CHILD SHALL LEAD THEM"

Why did Kir sacrifice herself. Was she that unhappy with her life?

Okay lets see if I can help you out a bit here Deaths: The husband and wife at the beginning of the film, Greg, Kir, Ty, Charlotte, Laszlo, Jacob, Eezkiel, Luke, Zane, Kurt, the Policeman, some of the children, 2 firemen, A police officer That makes 18 or so that I can remember and that I know of
Couple in the beginning:
Okay the man gets killed when Eezkiel makes him get struck by lightining, and the children kill the woman
Greg:
: After being cornered under a car by two kids he lights a puddle of gasoline or oil with a torch and blows himself and the car up along with the 2 kids.
Kir:
: She sacrifices herself to HWWBTR by jumping into the silo of fire.
Ty:
Zane stabs/slices him in the jugular with a machete
Charlotte:
She gets hacked up by a sickle.
Laszlo:
He runs into a harvesting scythe.
Jacob:
He gets stabbed by Eezkiel.
Eezkiel:
Allison stabs his hand with a meat hook and throws him into the burning silo.
Luke:
His body falls apart when the police man attempts to arrest him.
Zane:
He falls off a balcony onto a pitchfork while fighting Allison.
Kurt:
This is the friend that the group is going to scatter the ashes of. He died supposedly while bungee jumping but actually we learn later that he meant to kill himself and he commited suicide.
The Policeman:
He dies when Luke's head burst open and something comes out of it and catches his face on fire like a torch!!
Some of the children:
Allison shoots one with a shotgun, Greg hits one in the head with a baseball bat.
2 firemen:
They die while trying to put out the silo's flame, they catch on fire.
Deputy policeman:
A girl kills him with a sickle (my favorite weapon!)
These are the ones I remember. Hope it has helped you out!
"A CHILD SHALL LEAD THEM"