With Porteus in Your Pocket, You're Good to Go
Porteus Linux is an almost perfect portable distro that gives you a choice of the KDE4, Razor-qt, XFCE or LXDE desktops in both 32- and 64-bit versions.
Don't think that a live version of a Linux desktop with the ability to save configuration changes is better than an operating system fully installed to a hard drive? Think again.
Its persistent memory feature, unlike regular live distro sessions, lets you carry a complete Linux desktop with all of your files and special application settings in your pocket to run on any computer.
Porteus boots from a USB drive or other bootable external media in as little as 15 seconds.