Illyism's Rideable Creatures for New Vegas (original file at http://fallout3nexus.com/downloads/file.php?id=3330). Ported by devinpatterson.

Rideable Creatures for NV requires NVSE (New Vegas Script Extender) located at http://nvse.silverlock.org/ This mod was saved with ver v1.0 b7 of NVSE.

I was very disappointed when I found out New Vegas would not have horses and when I saw rideable creatures for fallout 3 I thought it was a great mod. I spoke with Illyism and he generously gave me permission to port it to New Vegas. Illyism's mod contained a;
* Brahmin
* Yao Guai
* Ant Soldier
* Centaur
* Ant Queen
* Deathclaw

But since I am having trouble getting the mounts to work when there are more than one, I decided to release the Brahmin and Yao Guai Seperately. This mod includes Betsy the brahmin (a creature cut from the final game). In the future a rideable creatures Yao Guai mod will be released. I will also include the orginal rideable creatures ported to NV in the optional files section.

This mod is an early beta. Some points to keep in mind;
It can be buggy, esp if you have an older ver of NVSE.
There is no 3rd person support (1st person only).
Mouse support is very poor (including the xbox controller if you don't use xpad), but steering you mount via keyboard works reasonably well.
Shooting while mounted works well, but a scoped weapon will not show the Telescopic reticle. Iron sights work well.

You have overheard talk at the west entrance of westside, that a caravan had been hit not an hour ago. They were northwest of westside, near Griffin Wares sacked caravan and Horowitz farmstead when they were attacked.

A note on the forthcoming Yao Guai mod. The Yao Guai is a very powerful mount, fast and able to climb very steep inclines. There will probably be a more extensive adventure to acquire and to use the mesh/texture and sounds you will have to own fallout 3 and extract some files from your copies BSA's. There will probably be the typical Yao Guai (based on the brown bear) as well as options for a Kodiak & polar bear version.

In regards to the other mounts (centaur, ant soldier and queen, deathclaw) I don't have any immediate plans to add them as I don't believe they fit well with the Mojave lore, but if there is requests to do so I will.

Here is the original readme from Illyism's archive;

Name: Rideable Creatures
Version: 1.6
Date: 1/25/2009
Category: Gameplay Effects and Changes
Requirements: Fallout Script Extender (FOSE) - http://fose.silverlock.org/
Recommended: Fallout Mod Manager
Author(s): Illyism
Homepage: http;//www.project-valhalla.org

Video by Expresate.

Description
===========
A long dream has finally come to reality! I know you all missed creatures to ride on, and now, you don't get a stupid horse, but even better. Centaurs, Brahmins, Ant Queens and EVEN Yao Guai! It is made with a very effective, advanced and reliable script.

Location
========
You can either go and find Isolated Camp(IsolatedCamp04) yourself, or you can ride the Yao Guai located at the Vault 101 exit, he will take you to the encampment.

Details
=======
Rideable Creatures:
* Brahmin
* Yao Guai
* Ant Soldier
* Centaur
* Ant Queen

Illyism is the vendor NPC, talk to him to buy animals, to get help and to get the whistle.

Mount Whistle:
You can summon your mounts to all around the world exterior cells.

Rider Perk:
After riding on horses for more than 5 minutes, the creatures gain 2x the speed. Has two perk entries.
1: 150% speed
2: 200% speed

Mount Combat:
You can toggle creatures if you want them to fight or not. Stop riding for a second, then press the "Always Run" button to toggle.

FOMM Install
------------
1. Place the fomod in a convenient place, for example: FOMM/mods
2. Start Fallout Mod Manager.
3. Click the Package Manager button.
4. Click the Add New button, locate the fomod
5. Click the Activate button.
6. You can close PackageManager now, then start Fallout 3

Manual Install
-------------
Extract the RideableCreatures.rar to the DATA folder.

FOMM Uninstall
--------------
1. Start Fallout Mod Manager.
2. Double-click RideableCreatures.
3. Right-click RideableCreatures and select Delete.

Manual Uninstall
----------------
* Remove Rideablecreatures.esp
* Remove Meshes/Illyism/Vehicles
* Remove Textures/Illyism/Vehicles
* Remove Sound/fx/fx/whistle


Incompatibility
===============
none known, possible some odd looks at IsolatedCamp04.

Known Issues or Bugs
====================
None thus far.

History
=======
1.
Initial Release

1.1
Updated FOSE script.

1.2
Added Deathclaw, added AllCreaturesBought message, added a goodbye option on selling animals.

1.3
Changed Vault Yao Guai to teleport you to isolatedcamp04

1.4
Fixed major bugs, attacked combat on mount, mounts now attack

1.5
added a Controls/Credits terminal. Scripted Toggable combat. Added the ability to ride non-buyable creatures if you have the Animal Friend Perk (Yao Guai). Refined perks, messages, notes, scripts. Added an extra perk level in the Rider perk. Minor changes in the dialogue. Created notes.

1.6
Added another NPC called VeliV, added an options menu for creatures, added mount inventory.


Contact
=======
Use Fomod to contact me.
1. right click on RideableCreatures and select "Email Author"
Also, project-valhalla.org

Credits
=======
* Illyism, Lead Designer.
* VeliV, special thanks
www.project-valhalla.org

Fallout Vehicle Project Team.
* NRN_R_Sumo1, Fallout Vehicle Project Leader
* Illyism, Lead Designer.
* Skykappa.
* HeyYou.
* Arklite.
* Citric_Acid.

Licensing/Legal
===============
You can do whatever you want with this mod but all I ask in return is that
you give me credit if you distribute any part of this mod.