Installing Vista X64 from hard drive

Need help to load Vista buissness X64 clean install from hard drive. On windows XP you could load the entire OS from the hard drive using the command WINNT bypassing the need for any floppy or CD-ROM once entire CD was copied to the hard drive. I woud like to do the same with my Vista X64 boot and install Vista X64 from hard drive.

How Can I do this like XP.