Oscommerce Categories Custom URL

we have an oscommerce ms2.2 shopping cart. We are looking for someone who can help us get better control over our Categories URL. Current URL for Categories and Sub Categories looks like this: [login to view URL] right now url gets generated based on the category name. we will like to add a text box in the admin panel (under categories page) where we can add a custom name for the URL. Custom URL Name: my-custom-category-name this will generate URL like: [login to view URL] it will remove -c-29_627_261 as well. categories that doesn't have the Custom URL Name: those will continue using current URL format. Redirect from custom url to new url will be needed as well. message me if you have any questions. if you manage to get this working without breaking anything we will be doing the same exercise for manufacturer and products pages.