gistfile1.txt

1. Use a ruby version

    rvm use 1.9.2-p248

2. Create a gemset

    rvm gemset create myapp

3. In the root of your app, add a file named ".rvmrc" with the following contents:

    rvm use 1.9.2-p248@myapp

Now, whenever you `ls` into that directory, it will automatically use your preferred
version of Ruby, with the proper Gemset.  Tada!