You will find four files in Deathblow folder. Here that each of them does:

(1) File (syncdeathanimations.gda) adds:

17 new finishing moves(Deathblows) for a combination a Shield-Longsword or a Shield-Waraxe,
12 new finishing moves(Deathblows) for a combination a Shield-mace,
13 new finishing moves(Deathblows) for for a combination a Longsword-dagger, a Longsword-Longsword, a Longsword-Waraxe, a Longsword-mace, an Waraxe-Longsword, an Waraxe-dagger, an Waraxe-Waraxe, an Waraxe-mace.
10 new finishing moves(Deathblows)for for a combination a mace-dagger, a mace-Longsword, a mace-Waraxe, a mace-mace.
13 new finishing moves(Deathblows) for Greatswords and Battleaxes.
3 new finishing moves(Deathblows) for mauls.

(2) File (creatureranks_blows. GDA):

Now almost each simple last blow on the opponent will ends with Deathblow.

(3) File (BITM_base. GDA):

Now All Waraxes and Battleaxes in game can cut down a heads (In original game to cut down a head by an axe was impossible).

(4) File (ItemStats. GDA) changes weapon balance of the game, makes its more realistic.
AFTER (BEFORE)
Weapon : Damage : Armor penetration : Speed : CritChanceModifier :
____________________________________________________________________________________
Longsword : 7(7) : 2(2) : -0.1(-0.1) : 2(2) :
Dagger : 4(4) : 4(4) : -0.5(-0.5) : 3(3) :
Mace : 6(5) : 4(4) : 0(0) : 0.5(0.5) :
Greatsword : 11(11) : 4(3) : -0.1555(0) : 4(1.5) :
Maul : 12(9) : 7(7) : 0.1(0.05) : 6(0.5) :
Battleaxe : 13(10) : 5(3) : 0.05(0.1) : 5(3) :
Waraxe : 8(6) : 3(2) : -0.05(-0.1): 2(1) :

Installation:

Copy Deathblow folder (or only the files you need) in:

Dragon Age Origins\packages\core\override

Deinstallation:

Simply remove folder Deathblow from Dragon Age Origins\packages\core\override

Compatibility with another mods:
If you use DAM mod,delete creatureranks_blows.GDA from here: Documents\BioWare\Dragon Age\packages\core\override\mutator.

The rights: Do with this mod all that you want and to full pleasure.
The author of this mod is me (Alexander Molodchy).
P.S.: as a bonus I apply to a mod the compillation of my music (dont like it - remove it:) my website: http://amensign.com