Bootable USB Media Notes

Assume that your USB disk’s drive letter is D:

CentOS/Fedora Bootable Installation Key

On Windows

Step 1 : Use diskpart to create bootable media

select disk 1
create partition primary   
select partition 1   
format fs=fat32   

For the step highlighted above, use list disk to make sure that your
USB stick is, indeed, disk 1. At this point, the USB stick has a
primary partition and should be bootable. However, it doesn’t have
anything to boot per se.

Step 2 : Use xcopy to copy over the files to be booted

From the directory containing the boot files (these could be Windows
installation files, for example), issue:

xcopy *.* /s/e/f D:\

Where D: is the drive letter of your USB stick. Et voila! Install

Other notes and resources