You use ninjamorph to extract all the files out of (create a new project with)system/framework/framework-res.apk,
and then you edit sdcard/androidthemes/workspace/framework-resapk/res/xml/xml/eri.xml with a hex editor (Either on a computer or with an app called hex editor)
Then you find the string Verizon Wireless and replace it with whatever you want, as long as the number of characters is the same. replace leftovers with spaces.
Like "I am awesome(SPACE)(SPACE)(SPACE)(SPACE)(SPACE)"