I'm on Windows, and am on a restricted network and cannot download the latest version of RailsInstaller (Ruby 1.9.3-p392, Rails 3.2), so I went with an older Windows version (Ruby 1.8.7-p352, Rails 3.0.7).
I have a working installation, but would like to upgrade to newer versions of both Ruby and Rails via the command line.
I've tried searching for the right resource to update via the command line, but no luck. Is it possible, and if so, how?