Nice looking script description

How I can create nice looking script description? The old days I was using simple HTML tags but now I was to give a professional look by adding photos, different header tags, bullets etc.

As I seen some authors are preparing images including the text there and then add these images to the description. But I prefer (if possible) to add HTML with css. Is this possible?

The best way is to use a ready template (eg in my website) and run this page as iframe. Is this possible?

Thank you all