My web site structure is:

CategoryName
`-SubCategoryName
`--ProductName

Say, the category name would be "Bugatti Veyron", with subcategory "France" and product "Pur Sang ##############" -- I do not want the URL to be rewritten as simply: http://www.site.com/bugatti-veyron/france/pur-sang-##############

I want the category name to be http://www.site.com/buy-veyron/france/pursang-############## instead.

Note: what I said is just an example.

All in all, I just want to adjust the Category URL. The subcategories and products can be whatever, but I really want to be able to change the Category URL. That page is also my landing page for SEO, so...

Any help?