edit css to load ony required menu style

thanks for your offer but I have done that allready.
what i would like to do is, speed up load time of this template by disabling other menu styles then one Im using.

You can check my test site if you like to...
this template is slow so another thing I have to do is group multiple images into one composite image using CSS sprites.

Can you give me any advice?

Image optimization gives best result when optimizing for speed, much more than js and css compression. I suggest you start from that.