I have used disk utility to take DMG files such as OSX and create a disk image onto the flash drive and upgrade / reinstall the OS on my mac. I don't have any blank DVD's to burn the win 7 ISO onto so I tried doing the same by putting the ISO onto a flash drive and it doesn't work in Disk Utility. I tried doing it on a XP computer which was (I think) successful in putting the disk image onto the flash drive. Now when I reboot and hold option I don't have any option to start up the computer other than the Mac HD. I have installed Paragon to be able to read and write NTFS files / disks. Does anyone know if its possible to install win 7 via USB onto a mac or am I wasting my time? Thank you in advance.