mobile

I own a ZTE Blade G 4.1.2 Android device , i recently installed a stock Belgium ROM from the ZTE official site .
I installed it straight from the phone it didnt require CWM , so I installed it straight from settings -> developer settings -> install update from SD Card . The installation went smoothly , i was very satisfied. I then rooted it. And then because i'm very smart of course , i decided that my speakers need a 'boost' so i downloaded an app called Beats Audio Installer . The app installed and then asked for a reboot. It rebooted and it's stuck on the ZTE Logo . From what i've heard i need to have a custom recovery so that i could do anything , which i don't . I can go in to the stock recovery fine , i tried installing the rom again from the stock one but it just says install /sdcard and then shuts off . Im guessing it's some sort of a verification process which this Rom isn't passing . Please Help , i'm a total noob at this.