.0 save picture as kz
1. open start
2. search for %appdata% press enter
3. open .minecraft
4. (if you are using a texture pack see step 8) open bin
5. open minecraft.jar with winrar or 7zip (whatever you have i don't care)
6. open art
7. replace kz.png with picture
8. open texturepacks
9. open your texture pack with winrar or 7zip (whatever you have i don't care)
10. follow step 6-7.

WARNING: save your old kz.png so you can switch between the 2.