Hi! This is kinda random, but I'm gonna help you with your profile cause someone helped me.
First go to 'My Mibba'
Then scroll down under profile and there you'll find CSS (click it)
Then you need to scoll down the page until you see pre-made layouts
Lastly, there will be several layouts to chose from, find one you like and click 'install'
I have a quizilla: www.quizilla.com/user/chickensorchix/
Check me out