Domain Mapping

Hi, i like to use domain mapping and ain't sure if my server is able to do it.

Current, I have installed MU on my site with the domain, http://hazmanlabs.com.

I have another domain purchase with this name: http://bigtreesg.com

And, on my website (http://hazmanlabs.com), i have created a subsite, http://hazmanlabs.com/bigtreesg.

I like to use the domain mapping to achieve http://bigtreesg.com over http://hazmanlabs.com/bigtreesg.

One of the way is url redirection. But, I understand with domain mapping , my friends can just surf to http://bigtreesg.com without know the real url that is http://hazmanlabs.com/bigtreesg.

The part which I don't understand is, you documentation stated for Server IP Address. Are you referring to the server that I am hosting where http://hazmanlabs.com is. Mine if not a dedicated IP.

I need some guide here.

Thanks,
Hazman Aziz