How to boot any OS from your USB

People want use different OS in PC or laptop ?? Here is a easy way to boot OS from USB.

Things you need
* A USB with free capacity of 4 GB or more.
* Any OS setup CD or setup file.
* PC running with windows and command prompt.

OK now let me give you the steps you need to follow.
1) Type cmd in run.

CMD->diskpart
Diskpart> list disk

select the usb disk name
then type following in diskpart>

diskpart> select [name of the disk wanted to erase(Disk 0 or Disk 1 what ever)so the command will look like "select disk1"]

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

Now steps to copy the OS from the setup CD to the USB.

If you need to copy the file from cdrom to ur USB type this in command prompt

xcopy (your cd drive name :\to the usb drive name:/s/e/f)
example: xcopy g:\f:\ /s/e/f

Then u need to go to boot menu and choose include "removable device" for booting at start up.

YOU can also format the usb with other software but this way is to use your command prompt.

This way you doesn't need to install in the primary hard disk.