One mod I made already has some of this. it's at; http://newvegasnexus.com/downloads/file.php?id=40027 It lets you get a train of 3 brahmin (maybe I'll add more/less), which follow black bart the lead brahmin. they can carry up to 600lbs all together. Each is unique and you can see they have different markings etc. They have to be taken from the viper gunslingers who stole them from a caravan. Actually I should probably re do the adventure since it was kind of my first one. But the brahmin are solid I use them with my character all the time. Also illyism was kind enough to give me permission to port over his mod of rideable creatures form fall out 3; http://fallout3nexus.com/downloads/file.php?id=3330 The Brahmin is one of the rideable mounts, unfortunately the Yao Guai isn't in new vegas :( It's probably well beyond my skill set to accomplish, but I'm going to give it a shot. Maybe with a lot of luck and a lot of help I can pull it off. You are WAY ahead of me !!! haha,, rad MOD, I will have to download it and try it out.