Problem with x64

Run CMD.EXE and type the following. WARNING: 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.
1. diskpart
2. select disk 1
3. clean
4. create partition primary
5. select partition 1
6. active
7. format fs=fat32
8. assign
9. exit
3. Copy Windows Vista’s DVD ROM content to the Flash Drive

To copy the files over just mount the image with a piece of software like power iso and extract the contents to the usb drive that you have just formatted.

Leave it plugged in to the pc and reboot, press F8 when the system boots and choose your usb drive from the list of drives available..

Easy as pie mate :)

All the contents or the drive that you're going to install from will be deleted. And to use it again just run a quick format from within windows. The drive that you are going to install to will keep all your old files in windows.old folder. That's aslong as you don't choose format during the installation.

as long as you don't format the hard drive you will have as you say a file called windows old and as far as your external drive goes, you should be able to reformat it and use it as normal again.

Dam you beat me to it.

Thats the way to do it! Good luck mate!