[gnome-love] How to customize Universal Access Setting Panel Of Gnome3.4?

[super hero <mr01031989 gmail com>]

Hiii

 I am interested to customize the Gnome 3.4 on fedora 17,making it have my own style.
But recently, I've tried editing the configuration file and bringing the
 Gnome down (forgotten what I'd actually done).
So, I need some help (tutorial or guide I means) to customize it, just 
like adding new feature  in  universal access setting panel.

 Thank in advance.