The UNetbootin application was designed to allow the installation of various Linux/BSD distributions to a partition or USB drive, so it's no different from a standard install, only it doesn't need a CD. It can create a dual-boot install, or replace the existing OS entirely.
Here are some key features of "UNetbootin":
· UNetbootin can install to your local hard disk or make a bootable liveUSB drive. It can also load floppy/hard disk images, or kernel/initrds, or (some) ISO (CD image) files, for installing other distributions.
· The current version has built-in support for many distributions
Requirements:
· A USB Drive
· A broadband internet connection to download the distribution packages
· Spare hard drive space to install the OS in
What's New in This Release: [ read full changelog ]
· Added support for SystemRescueCD
· Added support for Kaspersky Rescue Disk
· Added support for F-Secure Rescue CD
· Added support for Dr.Web Antivirus
· Updated translations