Style and customize ReCaptcha from MVC 3.0 Web Helper

I am used this tutorial http://www.dotnet开发者_如何学运维curry.com/ShowArticle.aspx?ID=611 to start with ReCaptcha helper ReCaptcha Web Helper in ASP.NET MVC 3 RC

By default ReCapthca looking a bit ugly and big,

i want to make that a bit simpler/smaller, remove play sound and other buttons, something like that:

May be some one may have an idea how can i do that?

You could specify the clean theme as shown in the documentation:

@ReCaptcha.GetHtml(theme: "clean")