I need to 'burn' an iso of a bootable dvd (not ubuntu dvd) image onto my USB flash drive. How can I do it in Ubuntu. In windows I was using MKBT tool.
I am looking for something like UNetbootin that can work for any iso.
take a look at this article: https://help.ubuntu.com/community/Installation/FromUSBStick
There's a package called usb-creator-gtk (and usb-creator-kde for KDE-desktop). This application has a GUI to copy an iso to an USB-drive and make it bootable.
there's no universal way to make a bootable usb - as i understand it, unetbootin on linux relies on casper and syslinux, while the windows installer relies on writing the correct bootsector to the drive.
Some sources claim its a simple matter of making a windows 7 iso and running unetbootin on it (which i'm slightly skeptical of, but its worth trying)
Alternately you can copy the files over to the drive and use ms-sys to it with the command - you would likely need to compile and install ms-sys yourself since some repositories don't have it due to potential licencing issues.
There's a whole thread of suggestions over at serverfault that might help