Using www.domain.com on mapped domains

I have successfully installed the domain mapping plugin and also mapped my domain. However, I would like to use the http://www.mappeddomain.tld version, instead of the default mappeddomain.com as my original site was using the "www" in front.

Is there a way to enable it? If so, where/how? Thank you!

Edit: if it's of any significance, I'm using sub-directories, not sub-domains, for my multisite (WP 3.0.3).

[Link edited ~ drmike]