Shop front display

[david64]

I was wondering if there is a way that products from all product categories for a particular Manufacture can be displayed. I always suspected that their could or should be, But what made me even more sure that their must be is that for some reason when I ran my sitemap generator I found a lot of URL's had been removed. When I actually followed one of the URL's what was displayed is all the products for the particular manufacture and asked if I wanted to subscribe to this feed. So what have I done to remove all these URL's from the sitemap? and how to display by manufacture?

I am using Vituemart version 2.0.24  , Joomla Version: Joomla! 2.5.14 and PHP Version    5.3.26