I've had a hard time integrating Ruby on Rails with my WampServer install and couldn't find any up to date info on Google, so I made a step by step guide on how to do it. For those of you who are interested, the guide is here: http://stackoverflow.com/questions/2025449/how-to-install-ruby-on-rails-alongside-wampserver/2032426#2032426
Let me know if I left out something!
Regards, Olivier