"THE KEY FEATURES" module

I need to customize "THE KEY FEATURES" module but my knowleadge about code is little more that the basic. It is a Custom HTML that calls gKClass (gkRocket and others) and so on. I tried few simple changes and the result was not good: http://dgrau1.hospedagemdesites.ws/
Do you can tell me step-by-step how can I do to modify texts and images without destroy everything?

Hi

This module do not have much to it. It's more of a css3 feature, but there is one tip You should know when customizing it. It was written using HTML and joomla editor strips some of HTML tags. Which means that in order to customize it You need to disable editor.