To save you some legwork, in Eclipse:
- Go to Help -> Install New Software…
- Click add (top right of popup)
- Enter a Name like “RadRails2”
- Enter the location as http://download.aptana.com/tools/radrails/plugin/install/radrails-bundle (for the full Aptana studio Studio 3, instead enter http://download.aptana.com/studio3/plugin/install)
- Click ok
- Restart Eclipse
- Go to Window -> Preferences. You will see Ruby is enlisted at left panel
You are done…
Now when you use the “New” menu, you’ll have the option to make a Ruby project (among other things).