Please do come on my profile anytime you want if you're in the need of good layout websites. By the way, the one I am using now is by Preci0us Layouts. :) Trust me, her layouts are good.
If you're new to Witty and new to designing your profile and customizing it, all you have to do is go on one of the websites, click on your favourite layout and COPY or DRAG the CODE into the SOURCE box (On the left hand - upper) Then write whatever you want.
Most of the websites already have instructions to how to manual this so you need'nt worry. X_ZeldaLuver_X