Hey, can anyone help me out with these questions?

1) How do I remove the shadow which appears when I press an app?

2) Does anyone uses Dolphin browser? If yes; how can I change the icon to my custom made icon? I tried making a bundle id; com.dolphin.browser.iphone but that didn't work...

3) I am using a theme called WeatherFurikios4 and I want to center the text, also lower it by a bit, how can I do this?

4) I'm currently working on a theme right now but atm I'm kind of stuck,
I have these two Camera+ & Google Translate icons, I want to replace them with my own icon.

My icon is minimalistic and transparent though, when I replace the icon with my icon this happens;

Thanks in advance!