Bellow are the steps I took to install it from Windows XP to an USB flash drive and boot it in my laptop.
- download the archive from http://www.tux.org/pub/people/kent-robotti/looplinux/rip/linux.exe
- create a folder and move linux.exe into it
- double-click to auto extract the contents of linux.exe (notice that a new linux folder was created)
- insert an USB flash drive in the computer
- click START -> MY COMPUTER -> right-click on the USB flash drive and select FORMAT -> choose FAT32 -> click OK
- take notice of the drive letter of the USB flash drive
- START -> Run
- change directory of the created linux folder, typically it should be something like cd Desktop\linux
- on the prompt type mkusb.bat h: in which h is the drive letter
To boot it up, restart the computer and follow your BIOS instructions on how to boot from an USB device. On my laptop, a Dell Latitude D620, I simply press F12 and select the USB device and press ENTER; this of course changes from laptop to laptop so read your computer motherboard manual.