Version 1.1 is out!
http://www.newvegasnexus.com/downloads/file.php?id=35083

You can choose between 3 settings (well, 4 including vanilla)
P.S. These changes only affect humans

1. Heads don't fall off (explode only)
- Like it says; heads will NEVER fall off when damaged. Instead, the chances of them exploding has been increased dramatically. Besides that everything else has been untouched.

2. No dismemberment (limbs still explode)
- It basically does the same thing as the first one, except instead no limbs fall off, and all of the limbs are 5% more likely to explode. (The head, on the other hand, is 30% more likely, giving it a 60% chance of exploding)
- Apparently, when using VATS limbs can still be severed.

3. No gore
- No gore. Just blood.

Enjoy.

Changes:

1.1
-Heads no longer explode when "No Gore" is on.

Awesome thank you

Sorry if I'm being picky, but is there any chance we could see a version that stops limbs from falling off but doesn't increase the chance of them exploding? I hate the fact that limbs could just be severed, so this mod is already great in my book, but I also don't like the idea of them exploding more than they already do (it already happens quite a bit, depending on the weapons you're using).

Honestly I only made it so that limbs would explode 5% more than usual; totaling to a 15% chance of exploding.
I basically doubled the chance of the head exploding though (it has a 60% chance now).
Knowing this, do you still want me to change it?

*uses the "no gore" mod*
Shoots a dead molerat's head off.

Umm, did I do something wrong? I enabled it in the data files menu.

It only applies to humans, I didn't think about the animals. PM me if you'd prefer no gore on animals also.

If you want to tweak it yourself, here's the variables (with defaults) from FO3. 95% likely they are the same in NV.

(normal)
iCombatDismemberPartChance=50
iCombatExplodePartChance=75

(for bloody mess perk)
iMessIntactLimbDismemberChance=15 *
iMessTorsoExplodChance=10

Set the dismember to 0 and leave the explode as-is (or reduce) and you're golden. There may be more variables, I suggest searching for "Chance" and looking through the list.

* Not sure if "Explod" is a typo or not off the top of my head.

What I did is different, I changed the defaultbodyparts data (in the "Actor Data" section) and unchecked a box that made the limbs severable. Whatever works.

EDIT: Updated to 1.1

Fast and easy way to remove all gore and blood is to add bDisableAllGore=1 to the end of the general section of fallout.ini, falloutpref.ini and falloutdefault.ini. Not sure which file did the trick, but now all blood and gore is disabled. This was originally for fallout 3, but by putting in all 3 files, it works for new vegas too.

This works a bit; but only works on human, not creatures.