Let me try and explain more in depth. Sorry about that. :)
Am using WordPress MU
The WP MU installation was installed on a separate server than from where the actual domain is being hosted.
The domain is pointing to the new server.
However when i go to the plugin and look at the generated sitemap.xml it is using the url's for the domain where the WP MU was installed and not from the actual domain that it is suppose to use... which is understandable since that is how the plugin works.
I need to change the url's on the sitemap to use those of the domain pointing to the actual server and not those of the server.
So the domain pointing to the server is for example: http://www.mydomain.com and the WP installation was done on http://www.anotherdomain.com, but the plugin is using http://www.anotherdomain.com for the url's on the sitemap.xml, but use the domain pointing to the server.
Hope that helps some more...