How to set up and config changes you need to make, more info in this gist.

First of all, RTFM!

Then, one thing that might go by unnoticed while you install anything, is your gem version. For instance, to install rails 3-1, you HAVE to have RubyGems version 1.8.11 or newer.

To update, simply do:

$ gem update --system

Also, you need isolate, so:

$ gem install isolate

One more thing to consider, after you install and update stuff, you need to...unfinished thought 💸