How to update my project to rails 2.02?

I have installed the gems already, but how to get my existing project
upgraded? I have tried the about page and its still saying 1.2.6.

You should check in config/environment.rb and make sure the gem
version is set to '2.0.2' or whatever.

You could also freeze Rails to your vendor/ directory using rake


Sure? But I know there are some file structure changes (e.g. the
introduction of initializers, which is one of the feature catch my
interest to update). How can I make them all consistent?

And- after I change it to 2.0.2 mongrel fail to start complaining
missing source code.

i.e., with RadRails, something to do with RadRails? Command prompt
ruby script/server works fine. BTW I am using Windows.

NO--- sorry, command prompt doesnt work too.

quire': no such file to load -- c:/ruby/lib/ruby/gems/1.8/gems/
-mswin32/lib/mongrel/init.rb (MissingSourceFile)

Mongrel has issue with latest rubygems on windows. I have uninstalled
mongrel and install only the latest, now it start to work (although I
heard there are still issues on the service, but I am doing only
development work on windows anyway, so its an non-issue)
Reference here:

So- about the new rails 2.02 structure, how can I ensure my entire
rails project is going to be updated properly?

For those come across the mongrel issue like me, this is a more
detailed explanation:

Change the rails version in environment.rb