All of the PS2 characters are now included. v2.5 fixes some problems, adds custom gibs, status dolls, and a few new skins. The pack is probably as complete as it ever will be.

Requirements: UT v436, Bonus Pack 1 (Advanced Model Support is included)

Download links:

Moddb:http://www.moddb.com/games/unreal-tournament/addons/ps2-characters-v25
Filedropper: http://www.filedropper.com/utps2charactersv26


Changelog:
2.6:
     Added War Machine with male voices (by popular request).
     Fixed Dominator's talk texture.
2.5:
     Added the War Machines (courtesy of Psychic_313).
     Added beta Blake and beta Kregore faces.
     Added Dominator skins for the PC/PS2 Skaarj Hybrids.
     Added Breath3 animations to characters so they work in the normal menu without Oldskool.
     Added several custom gibs for Damien, Dominator, Rampage, and Xan. Dominator and the Skaarj Hybrids also use Skaarj gibs.
     Added acknowledgement and other sounds to Dominator's voice pack.
     Removed Dominator as a separate class. His skins have been split into another file and moved to the SkaarjBoss class.
     Dominator's talk texture no longer changes based on the player's team because of the above change.
     Dominator now uses tskmskins_dominator.utx for his custom skin and tskmskins.utx for the original Skaarj Hybrid skins.
     Changed Dominator's team skins to use the Skaarj symbol.
     The UV maps of each character are now perfectly scaled.
     Optimized the skeletons of each character. They are now all much closer to Epic's original models.
     Removed unused dummy bones from each model.
     Fixed the tearing problem with every model.
     Replaced male ISV commando skins with the skins from the UT beta.
     Changed "Zachary" to "Nickolai (Beta)" and used the texture from the UT beta.
     Female characters now use the animation file included with Advanced Model Support.
     Improved Damien's status doll and added new status dolls for everyone but Rampage and the soldiers.
     Made adjustments to Damien's team skins.

2.4:
     Impoved a few animations for the Skaarj Hybrid (such as Wave and Dead9)
     Made several "SM" animations unique for the Skaarj Hybrid
     Fixed a model problem with Dominator and the Skaarj Hybrid
     Added PC skins for Xan MKII and Rampage
     Removed the need for Bonus Pack 4 and the Bonus Pack 4 Skinnability Fix (for real this time)
     All of the Skaarj characters should fit into the same places that the PC Skaarj Hybrids can

2.3:
     All of the bots should now play their sounds when hurt or killed.

2.2:
     The Bonus Pack 4 Skinnabilty Fix is back as a requirement (I can't figure out why the models need it, sorry!)
     Fixed the problems with collision that I caused in the previous fix
     Improved the Male Commando ISV skins

2.1:
     Fixed a problem with the Skaarj Hybrids floating above the ground
     Gave Dominator/Skaarj Hybrid bots the correct voice packs
     Improved collision of all Skaarj characters
   
2.0:
     Made all models larger to fit with the regular UT characters
     Moved Damien's class files from DamienPS2.u to UTPS2Characters.u
     Removed Psychic_313's Skeletal Characters/Bonus Pack 4 fix as a requirement
     Added Female Commando, Female Mercenary, Male Mercenary, Dominator, Skaarj Hybrid, and Skaarj Boss characters
     Added Necris skins to the Male Commando
     Added Raw Steel skins to Male Soldier
     Added ISV Kran skins to the Male and Female Commando models
     Added Mercenary, Commando, and ISV Kran skins to the Male Necris
     Added Thunder Crash, War Machine, Iron Guard, and Soldier skins to the Raw Steel
     Added missing Athena face to the Female Soldier
     PS2 variants of regular models now use talktextures from their original .utx files
     Gave Damien statusdoll and statusbelt textures
     Damien, Xan, and Rampage now play sounds when doing the challenge taunt
     Xan and Rampage now have their own models
     Slightly improved Damien's teamskins
     Added missing 'Walk' animation to male animation file (for when the player doesn't have a weapon)
     Made various improvements to all of the models
     Added new talktextures for every previously added model aside from the Male and Female soldiers
     Added Zachary, a previously unnamed character that was seemingly cut from UT (you can see him in Nickolai's original talktexture) to the Male Commando skins
     Added a new talktexture for Nickolai

Uh, what? I'm pretty sure I would notice if I put Damien's skin into one of the system files, because he never had one in the zip file with the 3ds max scenes.

They use the Warboss animations because they use the same animations in the actual PS2 version of UT. There is a female commando (and female necris) model, but I haven't had time to put it in the pack yet.

Thanks for the suggestion! I was able to use 3D Ripper to extract Damien's skin! 

I'm going to update the pack sometime today (once I make his teamskins and talktextures).

Preview:

Here's version 1.2 (and Damien).

http://www.gamefront.com/files/20057057/UT_PS2_Characters_v1.2.zip

http://rapidshare.com/files/450603164/UT_PS2_Characters_v1.2.zip

http://www.mediafire.com/?u69zx38yvghz8x4

Wow, looks awesome!

Ive heard those maps were from the mod rocketarenaut.
Might be wrong though ... .

While I am going to wait to release this update, I figured I should post some progress. I finished the two female commando models and the male mercenary model. I also added extra skins to the 3 commandos, as you can see in the first two images. They were included in the .max files, so I figured they were in the PS2 game somewhere.

Also, here are some renders of the Skaarj.

Update: All three Skaarj Hybrid models are in-game, although they are far from being finished.

The helmet skin for the SkaarjBoss changes based on the face the player chooses.

Dominator:


Regular Skaarj Hybrid (with a bonus skin):


SkaarjBoss:


Edit: I just got the models of Rampage and Xan MKII to work, so there will be 14 models in the pack once it's all finished.