Tutorial on how to change the notification Panel and background wallpaper on Galaxy S3 GTi9300. You need root and install CWM Recovery into your Galaxy S3 before proceed to the tutorial as below.
Step 1. There is lot of style of notification Mod, so choose and download which mod you interest to setup on your Galaxy s3. For example, the Mod I download is Spiderman_Vr.zip. You can download from the source here- Vegeta2.
Step 2. Place the downloaded mode ( Spiderman_Vr.zip ) into your Galaxy s3 storage.
Step 3. Boot into CWM Recovery Mode by press the Volume UP + Home + Power Button.
Step 4. Now your are in CWM Recovery Mode, then you go to SDcard storage to choose and flash the mod (Spiderman_Vr.zip) you have download.
If the method as above not work on your Galaxy S3, then you need to flash the OMEGA Custom ROM into your Galaxy S3. Then follow the step by step tutorial as above to change your Galaxy s3 Notification Panel and Background.