Clem Rock wrote:
> I should have mentioned that I was on Mac Os 10.4

Install MacPorts, then:

     sudo port -v install ruby
     sudo port -v install rb-rubygems

That will install a new Ruby in /opt/local, leaving your original Ruby 
intact. Then you just have to make sure /opt/local/bin is in your path 
before /usr/bin, and you'll be good to go.

Pete Yandell
http://notahat.com/