Question: Trying to create a [Hiren's BootCD](http://www.hiren.info/pages/bootcd) on a USB. Not needing anything else such as a dual boot of Ubuntu and Haren or Window's and Haren. All the programs that I can find to complete this either end up directing me on how to create a Ubuntu boot on a usb, or how to do it on Windows. But since it is my Windows computer that I'm trying to fix I need an alternative. Please Help?

Answer: 
Another unusual approach that just saved me in this situation and hence should be mentioned here, is, that GRUB2 can boot ISO images directly!

The Ubuntu help describes it as such:

1. Install `grml-rescueboot`.
2. Place your ISO in `/boot/grml/`.
3. Run `sudo update-grub`

This will automatically create a boot entry for every ISO in that directory, using loopback and chain-loading.

So as long as you got a working Linux partition of any kind that has GRUB2 (wich is much easier and reliable to achieve), you can boot any ISO, even if it’s a problematic one.

Saving a normal Linux user from even needing any external medium.
(Though loopbacks can boot isos from other partitions/media too, if you are willing to not use grml-rescueboot and do the GRUB2 config manually.)
You can make a bootable USB on Ubuntu from any (bootable) .ISO image using `dd` command:

```
dd if=./someisofile.iso of=/dev/sdb

```

however, I'd like to warn you that `dd` is a very dangerous command and you should only proceed if you fully understand the meaning of its parameters, in particular, the `of` one. 

If you google for something like "dd iso usb", you'll fins quite a few tutorials, for example [this one from Fedora](http://fedoraproject.org/wiki/How_to_create_and_use_Live_USB#Using_dd_for_a_direct_copy), [this one from Linux Mint](http://community.linuxmint.com/tutorial/view/744), or [this one from ArchLinux](https://wiki.archlinux.org/index.php/USB_Installation_Media)