http://www.otgnet.com/Content/Default.aspx?Cat=all,Title=3764

1. Acquire an ultra-fast USB 2.0 flash drive The drive I and my coworkers
recommend is the Apacer 4GB Handy Steno USB Flash Drive HT203, 200X Hi-Speed USB
2.0.  It's the fastest USB 2.0 Flash Drive that we've found - it has a read
speed of 25MBytes/sec. & a write speed-14MBytes/sec and also works great as a
ReadyBoost cache.

2. Run CMD.EXE and type the following.  Note: This set of commands assumes that
the USB flash drive is addressed as "disk 1".  you should double check that by
doing a list of the disks (type "list disk") before cleaning it.  If you have
multiple hard drives, like an SDFlash drive or a Multibay drive, you could end
up wiping your second drive using this command.

diskpart
select disk 1
clean
create partition primary
select partition 1
active
format fs=fat32
assign
exit

3. Copy Windows Vista's DVD ROM content to the Flash Drive Simply issue the
following command to start copying all the content from the Windows Vista DVD to
your newly formatted high speed flash drive.

xcopy d:\*.* /s/e/f e:\

============================================================
from Michael Hensley  7/13/09
============================================================
1. burn vista iso to dvd
2. Make a bootable USB flash drive
   http://www.intowindows.com/how-to-install-windows-7vista-from-usb-drive-detailed-100-working-guide/
   a. Insert the flash drive into your computer
   b. From the cmd prompt (run as Administrator if you are on Vista or Win7):
         C:> diskpart
         DISKPART> list disk
      Find your flash drive in the list (the easiest way is by size). Assuming
      it is Disk 1:
         DISKPART> select disk 1
         DISKPART> clean
         DISKPART> create partition primary
         DISKPART> select partition 1
         DISKPART> active
         DISKPART> format fs=ntfs
         DISKPART> assign
         DISKPART> exit
   c. Assuming the flash drive is now drive F: (check it; the steps above may
      have changed it), and the installation DVD is in drive D:, do this:
         C:> d:
         D:> cd /Boot
         D:/Boot> .\bootsect.exe /NT60 e:

3. Copy the installation files from the install DVD to the USB drive.