You can add another NetBIOS name in the
section of the Windows registry by adding the
OptionalNames string value.
If three or more NetBIOS names are required, use the multi-string value with the same name.
This NetBIOS name is not treated the same as the server’s "primary" name. To aid in name resolution add a DNS CNAME record that points to the server’s primary name.
For more info take a look at http://blogs.techrepublic.com.com/datacenter/?p=2593&tag=nl.e071
Another interesting post about this theme is the following:
Multiple names for one computer from Jose Barreto's blog