Rails - Jan 2006 - Generating consolidated rdocs like api.rubyonrails.com

How do I generate a consolidated set of rdocs for my local rails 
installation  like the docs at api.rubyonrails.com? Currently I have the 
rdocs for each package ( actionpack, activerecord, etc... ) that were 
autogenerated when I downloaded the gems. Is the api.rubyonrails site 
doing something special or is there a rake task that will generate my 
local docs the same way?

Thanks!

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