To configure nice menu for each of my website page

Hi Everybody,

We're using different themes for different sections of the website. Each section of the website has different look and feel. Nice menu is configured according to main section and when I make any changes to Nice menu's CSS it overall effects all the themes. I want to have cutomized nice menu for each section (page) of the site.

Can anybody help, how can I acheive that?
Any help is highly appreciated.

Regards
Zag