SAP as Web Service Provider : Can an alias be set up!? How!? Or is it a SAP basis topic?

Usually a web service et.c provided by SAP can be reached by an address similar to this:

http://myhost:9999/abcd/ws/pm/orderhdr/wsdl/bndg_E0AD8656CF82B7F19DA1005056856030/wsdl11/allinone/ws_policy/document?sap-client=110

Now it happend to be that the address has a name of the server machine - and the common wish is to change that address to something more sustainable alias.

The question can the myhost be changed to an alias?

If so, where should it be done? Is it something that can be adjusted in the SOAMANAGER? 'Alternative Access URL' !? 

Look at the following linked picture:

http://wiki.scn.sap.com/wiki/download/attachments/221351146/007.png?version=1&modificationDate=1308065224000&api=v2

Or is it really that something that the basis needs to set up?

Any input on this is appreciated as I could not really find a lot on this.

Thanks,

Chris