I have found the solution for setting up a Ruby 1.9.1 environment with
rails alongside another ruby and rails environment in a Windows Vista
Step 1. Download the Ruby 1.9.1 binaries for windows and copy into a
directory. I have called mine c:\ruby191.
Step 2. Add c:\ruby191\bin to the path statement
Step 3. Download the latest version of rubygems, 1.3.1 in my case.
Step 4. Install gems 1.3.1 Open Command Prompt, go to wherever you have
downloaded rubygems-1.3.1 is and enter c:\ruby191\bin\ruby setup.rb.
This should load gems into your ruby191 environment. Gems is used as an
installer in the ruby world.
Step 5. Download zlib, I had two goes at this to get it right.
http://www.zlib.net/ is the website. Once you have downloaded it copy
zlib1.dll to c:\Windows\System32\ and rename it to zlib.dll. You may
have to reboot at this stage to get the rest of it to work. If you get
the wrong version you will get a segmentation error in the next step.
Step 6. go to c:\ruby191\bin\ in command prompt and type "gem install
rails --source http://gems.rubyonrails.org/" to download rails 2.3.0
RC1. See http://rubyonrails.org for these instructions as it "edge"
Step 7. I then created a new project using NetBeans 6.5, and it seemed
to have worked, it recognised the right version of ruby and rails, (it
sould work if you do it the normal way with the command prompt). I have
not done anything in the project yet but will update you with any issues
I encounter. It has taken many hours to get to this stage.
Unfortunately windows users are in the minority with ruby/rails users so
you will need to learn how to install binaries and rails as the bloke
who used to write the windows loaders has given up doing it. I could not
find any documentation on how to load ruby binaries and rails or any
other framework environments in one document. It took me a while to get
this far and I am not sure if I have done it correctly. I will let you