How to install Virtual Infrastructure Client on a 64bit OS?

There is a viclient that is possible to install on 64 bit windows included in VirtualCenter 2.5 Update 1 and VMware Server 2 beta2.
 
Rather than replicating information, here is a pointer to a thread in VMware Communities: VI Client 2.5 only supports 32bit OS?" and an even better HOWTO written by Douglas Brown at http://www.dabcc.com/article.aspx?id=6826.