Insert a custom HTML comparison chart to my theme

Hello.

I have a wordpress installed and running and I would like to add a custom comparison chart.

I have the option to just insert an image file, but I found a free html/css and PSD template
http://www.allfreebrush.com/Vectors/Templates/2010/1102/2451.html

I should admits that it is a little beyond my skills but it will make a good practice…

So right now, I have inserted the CSS in my custom.css file and uploaded the files in my theme directory.

Any help for the rest of the job would be much appreciated.