How do you make a USB drive bootable so I can load W7 on a netbook?

The method above works well, however if you want the long method and works 100% here it is:

Requirements:
• USB Flash Drive (4GB+)
• Microsoft Operating System DVD (Vista / Windows 7)
• A computer with Vista / Windows 7 installed.

Step 1: Format the Drive
WARNGING!: This will erase everything on your USB drive.

1. Insert the USB Drive
2. Open a Command Prompt as Administrator
(Right click on Start > All Programs > Accessories > Command Prompt and select “Run as administrator”)
3. Find the drive number of your USB Drive by typing the following.

diskpart
list dis

The number of your USB Drive will in the list. You will need this for the next step.
Note: I will assume that your USB Drive is disk 1.

4. Format the USB Drive by typing. Replace the number “1” with the number of your USB Drive.

sel dis 1
clean
cre par pri
sel par 1
act
for fs=NTFS quick
or
for fs=FAT32 quick (if you wish to use FAT32)
ass
exit

Note: Do not close the Command Prompt you will need it for more steps.

Step 2: Make the Drive Bootable

Use the bootsect utility from the Vista or Windows 7 DVD to make the USB drive bootable. In the same Command Prompt Window you were using above.

1. Insert your Windows Vista / 7 DVD into your drive.
2. Change directory to the DVD’s boot directory where bootsect is stored.

I will assume your DVD drive is E:

e:
cd e:\boot

3. Use bootsect to set the USB Drive as a bootable NTFS drive. I will assume your USB drive has been labeled P:
bootsect /nt60 P:
xcopy e:\*.* /s /e /f p:\

Note: if you are not comfortable using xcopy you may skip xcopy and use Windows Explorer for Step 3.
4. Close the Command Prompt Window.

Step 3: Copy the entire contents of the Vista or Windows DVD to the USB drive.
Set your Computers BIOS to Boot USB devices: Boot this USB Drive to install Windows or start a system recovery.