I would like to change the localization of some of the game's weapons (and other stuff). For example: Blaster Rifle to A280C Blaster Rifle

Is it possible? I am not talking about a custom map (I know how to do it there),but I am talking about the standard (vanilla) game with the Evolved mod

*I already have a hex editor (if it happens to be the way)

most changes on the stock game go this way:
Creat an project, add all stock assets/scripts/what ever to it, mange and replace the lvl file.

This CAN break multi, but it needn't. Mostly all graphical things won't, everything else (renaming, changing values,...) will break multi.

An other way is to manipulate with custom user scripts if you want to change some scripting/functions.

==edit==
Localization goes to core.lvl

I rarely play MP (Gameranger/master hate me for some reason) so I kinda don't care for losing MP.

Also from what I get is

-make a new project (ABC or something)
-take everything from assets and add it in
-munge
-replace lvl file (which lvl file? confused here)

I want to have the evolved sides but with changed localization...appears to be impossible.

it depends on what you want to change. It was a common step by step tutorial for you. That's why I edited the post to tell you that location goes to core.lvl. You see?? And you won't need the rep, CIS,... stock assets, to change localization. So just take all things that goes to the stock lvl file. For core it is pretty less, ingame for example is much bigger.

You need to replace the game's stock core.lvl. There are several things you must setup before that can happen. The core.lvl produced by a mod folder is nothing like the default core.lvl and will crash the game is used.

Your core.req needs to be this (by Zerted)
Then you need some sound files posted by AceMastermine;
http://www.mediafire.com/download/70bqo ... vl_sfx.zip
Put those sound files inside of data_ABC\Sound\global\effects

Then last you need to copy
BF2_ModTools\assets\common\sound folder
to:
data_ABC\Common

Then in your mod project folder, run editlocalize.bat and change what ever you want. Save changes and munge. You should get a new core.lvl about 6.9-7mb. This can now work as a replacement for the default one.

How to rebuild the game's core.lvl is explained here:
viewtopic.php?f=27&t=31018&p=512346#p512346

Thanks for all the answers,I understand how to do it but if I do this won't the game crash with evolved or something?

There is no reason why Evolved should crash. Evolved is a new compilation of the stock side lvl files. Only Msh and some effects have been changed. The weapon odf names are the same. So the localisation tree is the same.