This video shows you how to install and Operating System on a Raspberry Pi.
Download links:
1. Image Writer for Windows:
http://sourceforge.net/projects/win32diskimager/files/Archive/Win32DiskImager-0.9.5-binary.zip/download
2. Operating System (I’m using Arch Linux)
Choose:
http://www.raspberrypi.org/downloads/
http://archlinuxarm.org/platforms/armv6/raspberry-pi
