Coolness! good instructions for trying Rails 3.0pre

This is worth sharing: easy to follow instructions for installing Rails 3.0pre.

Thanks to Oscar Del Ben!

Yesterday I spent 90 minutes trying a fresh install of Ruby 1.9.1 and Rails 3.0pre with no luck, so thanks to Oscar for his writeup. BTW, I Used Ruby 1.8.7 when following Oscar's directions.