on nexus each mod tells me which master files each mod needs to go after and i make sure everyone that needs to be in front is in front but my game still crashes. so what else can make it crash?

You should use FNVEdit and see if there's a problem with your load order, but it could be something else, maybe you need another mod to make some mod work. What was the last mod you installed before it started crashing?

Yea FNV Edit is a good program to see if you have any missing masters, just make sure that all the mods you are using are checked off when you run it.

Also it sounds like you could have a load order issue. If that is the case it may be a good idea to use a program like LOOT to help you sort your load order.

LOOT actually messed up my load order a little bit, I had to organize it myself with the help of FNVEdit. But it might work for you, so who knows.

il get it and see if it helps me. and the latest mod i installed was a weapons animation mod

Weapon Animation Replacers by joefoxx082? Or Weapon Animation Replacers - Enhanced Camera compatibility pack? If it is the one by joefoxx082, you should install it with this http://www.nexusmods.com/newvegas/mods/43240/? there's a youtube video in the description on how to install it, but don't just copy/paste them in the data folder since it can only use one animation, not all of them.

Also if you could have load order problems which LOOT would be a good utility to have although it uses alot of memory. http://loot.github.io/

If you are trying to install WAR by joefoxx82 there is an all-in-one installer found here. You will just have to use a mod manager.

Btw... I forgot to ask at what point does your game crash? Does it crash back to your desktop right away, before you even see the intro and get to a menu, or is it while you are trying to load a saved game?

Download and use http://loot.github.io/

Ok this is just too simple but it can help a lot.

Try to disable all your mods and then enable all your mods mod by mod,this is how you can see wich mod crashes you

yes it was the one by JoeFoxx082 and i have the FOMD one. snowglodecolector, il see if it works, it crashes before it even starts playing the intro.

Have you sorted out your load order with LOOT? or defragged your hard drive? Also you might want to check your load order to see if you have a esp or esm that is not necessary or you don't have the master file for.

i disabled all my mods and it still crashs

Have you done any of the tips i suggested i've been in your situation before and doing them always seem to help.

i deactivated them one at a time and tried to launch it and it crashed every single time

Defragged your hard drive? used LOOT? Also have you tried to use DLL fixer to see if your missing any important game files?

So does your game works at all even without mods?

i downloaded new vegas and installed it again and i put the script extender in and then i tried to use the Darnified UI mod and when i change the fonts in the ini files it crashes before it can reach the second image in the intro but i deactivated it and changed the fonts back to the vanilla ones and it runs fine then. i don't see what i can be doing wrong with teh darnified ui cause all i did was add it to nexus mod manager and then change the fonts like your supposed to and thats it

Are you using NVSE? or FNV 4G? These require you to run your fallout game from a different executable rather than the default one and depending on which mod manger you are using they might not be running properly if they are not set up and run from within the mod manager.

Another suggestion I have is running the fallout launcher and making sure that all mods are unchecked that way b/c I know i've done some installation's where I had to check the mod off in the launcher as well as the mod manager.

Out of curiosity, which mod manager are you using?

nexus mod manager.