There are two pieces of software you’ll need in order to use Rails on Windows XP: the Ruby programming language with RubyGems installation package, Rails 2.3.2(the latest version of Rails), and the Ruby/Rails Oracle database library. To download and install Ruby with the Gems package installer, do the following:
Go to http://rubyinstaller.rubyforge.org/.
Download the “One-Click Ruby Installer [...]