Draak, you mean the geckoes? Use VATS. They have a really erratic attack pattern, but should go down easy with headshots. I can put up my mod list later if you're interested -- it's mostly minor tweaks (more crafting recipes, and no leveled lists). I wouldn't recommend the cut content restoration mods. The cut content isn't that great.
I really wanna know what's triggering your motion sickness though. Have you checked for any mods that slow down movement speed..? I don't think I asked about that earlier. I think the lack of movement deceleration/acceleration might be playing a role. Slower movement speed across the board MIGHT make that less apparent.
Please, do share your mod list! I'm specially interested on the crafting one, I love this kind of stuff. I tried VATS, but these little fuckers keep ganging up on me. I had to run away from a bunch of geckos haha. (I'm terrible at the game)
As for the motion sickness, I don't play first person games unless it's on a tiny screen like the ones found on portable systems. I think it's the way you control the camera with the mouse in NV that's getting to me, a fixed camera would've been better. I can play hours of Dragon Age Origins and Mass Effect 1-3 and have no issues.
Back on topic...
Got the digital 3DS version of Monster Hunter 3 Ultimate. I'm so glad to finally play a third gen MH game in English, since I never owned a Wii. P3rd is fun, but checking the internet for translations was a pain and the fantranslation is still incomplete. I'm going to miss the felynes though, hope the shakalakas are as fun to hang out with.