Universal USB Installer can easily create bootable USB sticks. It allows you to choose from a large selection of Linux distributions.
I discovered this tool as I needed to create a DBAN (Darik’s boot and Nuke) bootable usb. It can also create many types of rescue boot cds. It’s worth checking out.
Rufus is another great tool that can create a bootable usb from an ISO and also create bootable DOS usb’s easily.