I would like to have some custom links in the dropdown menu, but then on the thirth level.

I now have like:

RootCategory
-> Category1 (eg Baby)
   -> Gender (eg Boy or Girl)
      -> Kind of clothing (eg trousers, shirts ...)

But i want to add an extra 2nd level category "Brands". On which i want to display some featured brands. I also have de Amasty Improved navigation extension, so my brandpages have the following url: www.website.com/brand.html

I would like to have this setup:

RootCategory
-> Category1 (eg Baby)
   -> Gender (eg Boy or Girl)
      -> Kind of clothing (eg trousers, shirts ...)
   -> Brands
      -> Featured Brand 1
      -> Featured Brand 2

But now they get the url: www.website.com/Category1/Brands/brands.html

My Question: How could i change the link in the navigation to the short url: www.website.com/brand.html

I am using Magento 1.8.1 CE