I've tried that already, thanks. Here's what I got when I tried it...

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computer-says-no:/usr/local/src/rubygems-1.3.5 d$ sudo ruby setup.rb
Password:
ERROR:  While executing gem ... (NoMethodError)
    undefined method `ruby_version' for Gem:Module
setup.rb:36: uninitialized constant Gem::SystemExitException (NameError)

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