I prepared a generalized image for both X86 and X64 of Windows 7 Ultimate which became a large image 8.64GB used as install.wim in sources folder, used with no problems on usb hard drive and flash drive the only thing is on some systems expanding windows files will not start for long what i mean it will remain at 0% for around 25 minutes so i assumed that is because the size of the image. i splitted the image to 1024MB then replaced install.wim in sources folder with install.swm, install2.swm,.... install9.swm at first tested it on usb HDD it worked very well and fast, when tried it on usb flash did not work and always stuck on copying windows files 100%. thanks jaclaz for your quick response.