How to set SMS custom background for Android phone

I'm from g 13 Wildfire S, but it should be ok.

1 Create media-audio-notification first. Specifically, a folder named Media (menu meaning bar) is built into the memory card, and then a folder audio (sound) is built into it, and a notification (notification sound) is built into Audio, and then the ringtone you downloaded is put in, so that you can directly see the ringtone you downloaded when setting the ringtone.

2. Set the ringtone. First, find the information in the application, and then click the menu below. If there is a setting, you will see the words notification SMS and MMS. What about you? Click the notification, click the third word of the notification tone, and then you can choose your ringtone.