well the most ideal way is to gain access to the dns entry and cname link the domain to the other, but this does not give you a new dns name.
So you can do a simple http redirect by putting this into a file called index.html
<meta http-equiv="refresh" content="0; URL=http://new.domain.name.com/">
seams to redirect me in less then a second
then simple put this in the http root of the server you want to redirect
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