how is this possible to burn an (bootable) iso image on flash/USb disk. I have searched thru google but did not find any related help.
Thanks in advance
Don't get me wrong of nothing but you would just transfer<cut and paste> it to the drive. Burning something is left up to CDs and DVDs. Then just make sure you set your bios to boot from the flash/usb drive!
The filesystem on a CD and HDD/Flashdisk are very different beasts. A Data-CD uses ISO 9660 (or HSF or a combination of others) while other devices make use of a FAT12/16/32.
Creating a MS-DOS bootable flash drive is generally done by creating a bootable MSDOS floppy disk, and then copying the files onto a freshly formatted USB flash drive while making the appropriate modification to the MBR. You need to back it up first because you must format/erase the flash drive.