As a favor for a friend, I'm making a Relz thread for this mod. The following is copied from his mod page.
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Dirnae's Beast Animations
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By Dirnae

1. Description
2. Requirements
3. Installing the plug-in
4. Playing the plug-in
5. Save games
6. Conflicts/Known Errors
7. Credits/Permissions received
8. Contact and Information
9. Legal Stuff/Disclaimer
10. Anything else

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1. DESCRIPTION
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This mod changes the Argonian and Khajiit running and walking animations to smoother variants.

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2. Requirements
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The Animation Mod version requires Liztail's animation kit, which can be found at Morrowind Modding History.
The standard xbase_anim_kna.kf replacement has no requirements.

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3. INSTALLING THE PLUGIN
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You'll want to use the standard version, unless you plan on using other animation kit mods which edit the beast animations, of which there are none at the time of writing this.
Either way, just copy the 'Meshes' or 'Animation' folder to your 'Morrowind/Data Files' directory.

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4. PLAYING THE PLUGIN
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The standard version will be playable as soon as you've extracted the 'Meshes' folder to your 'Morrowind/Data Files' directory.
If you're using the animation mod version, you'll need to run the animation kit, enable the mod and then press the 'Apply Anim Mods' button.

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5. SAVE GAMES
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Can be used with old saved games with no ill effects.

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6. CONFLICTS / KNOWN ERRORS
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Animation mod version will not conflict with anything.
The standard version Will only conflict with any other mod which edits the beast animations, of which there are none at the time of writing this.

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7. CREDITS/PERMISSIONS
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Thanks to Liztail for the Animation Kit, and Bethesda for Morrowind.
You can edit and use this freely for Morrowind, consider it a resource. Crediting me would be nice, but I'm not too fussed.

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8. CONTACT AND INFORMATION
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Skype: dirnae
E-mail: dirnae@live.com
Dirnae on the nexus forums too.

If you want to make a suggestion or report a bug, please use the Nexus comments section; I will be watching it.



http://morrowind.nexusmods.com/downloads/file.php?id=42080

Is it he same file available on his topic in Fliggerty site ?

I bet this is a just a trick.

April fools was ages ago Dirnae.

Theres a .gif on the mod page. It's real

But papill6n, I don't know. Probably is.


Edit: No, papill6n, it's not.

He told me:

If he want this file I have it. I want just to know which version i the best/more complete , Fliggerty's one or this one? Thanks

The File off of Nexus is the most complete, use that one.

I guess this wont work with Civilized Beasts?

I don't know, please use the contact information above if you have any questions. Thanks

Whee!

Truely insightful.

Use these myself, they work pretty damn good as far as i can tell, a hell of a lot smoother than the vanilla anims. Will let you know if i spot any problems. Eagerly wait for all the swimming anims and such.

Off the top of my head I'm thinking not because civilized beasts are retextured humanoids and humanoids don't share any animation files with beast races. You could, however, attach these new animations to the new beast races to have them use the animations, but it'll only work if the skeletons are the same.

How to make it no Liztail's dependant?

"The standard xbase_anim_kna.kf replacement has no requirements." Liztail's its only needed of there is another animation mod affecting beasts, and apparently none yet exist.

Holy crap, badass

I was dreaming this would happen sometime.
Thank you so much Dirnae.

Awesome!
I'll try this soon, thanks.

Great! I haven't tried it ingame, but from the .gif at the Nexus it looks really good.

So... can we expect more replacers for Morrowind's animations in the future?

From what I understand, he intends to do the non-beast races at some point to. Don't hold me to that though.

x 9001

Awesome! That is sooo cool! I'm so so excited. ^^ Maybe now I'll actually enjoy having a beast companion for a change. The lack of animations and graphical upgrades for beasts makes me...not enjoy their company as much as the HD men. ^^"

Does it work with custom beasts? I use Liztails body for all of them so the anim should work with it?

I've tried this out in one of my development installs now; liking what I see. Thanks Dirnae!

This should work with any race that's labeled as beast.

Thanks Jac.

I have triangle holes in my legs http://i974.photobucket.com/albums/ae224/mwscreen/pic2.png http://i974.photobucket.com/albums/ae224/mwscreen/pic1.png

Did it with Animkit.

I used the non-animation kit version. I'm using Slof's beasts, though, so that might make a difference.

You right. I have Liztails Khajiit and Slofs argonians and the Argonians have no holes