how to make a usb hdd disk bootable with windows system in it???

situation
	Are you boring to burn dvds for setup? With usb flash disks the setup gets much faster!
problem
	how to make a usb hdd disk bootable with windows system in it???  works witn windows7, windows server 2008 / r2
difficulty level
	8/10
solution
	We assume that you are using either Vista or Windows 7 to create a bootable USB. 1. Insert your USB (4GB+ preferable) stick to the system and backup all the data from the USB as we are going to format the USB to make it as bootable. 2. Open a CMD 3. When the Command Prompt opens, enter the following command: DISKPART and hit enter. LIST DISK and hit enter. Once you enter the LIST DISK command, it will show the disk number of your USB drive. 4. In this step you need to enter all the below commands one by one and hit enter. As these commands are self explanatory, you can easily guess what these commands do. SELECT DISK 1 (Replace DISK 1 with your disk number) CLEAN CREATE PARTITION PRIMARY SELECT PARTITION 1 ACTIVE FORMAT FS=NTFS (Format process may take few seconds) ASSIGN EXIT Don’t close the command prompt as we need to execute one more command at the next step. Just minimize it. 5. Insert your Windows DVD in the optical drive and note down the drive letter of the optical drive and USB media. Here I use “D” as my optical (DVD) drive letter and “H” as my USB drive letter. 6. Go back to command prompt and execute the following commands: D:CD BOOT and hit enter. Where “D” is your DVD drive letter. CD BOOT and hit enter to see the below message. BOOTSECT.EXE/NT60 H: (Where “H” is your USB drive letter) 7. Copy Windows DVD contents to USB by any way (i.e. total commander). You are done with your bootable USB. You can now use this bootable USB as bootable DVD on any computer that comes with USB boot feature (most of the current motherboards support this feature). Note that this bootable USB guide will not work if you are trying to make a bootable USB on XP computer.