Insane MBR(Partition) Fix

Hi,Friends Today I have found a fix to make USB drive Bootable,
Open a Command prompt on a working Windows 7 Insallation.
Make sure to have said Flash drive plugged in.
Run "diskpart"
Run "list disk"
Find your drive, run "Select Disk X" Where X is the number for your drive. MAKE SURE OF THIS
Run "clean"
Run "create partition primary"
Run "select partition 1"
Run "format fs=fat32" Let it finish
Run "active"
Run "assign"
Run "exit"
Now copy the Windows 7 files from the disc in their entirety to the Flash drive.
That's how i've always done it, never failed to work.