Building RubyGems, lib/ in load path?

Hey, RubyMine has really grown on me, I want to use it for developing rubygems too (I've been using TextMate for this). Gems usually have this structure

lib/mymodule.rb

test/mymoduletest.rb
test/test_helper.rb, with
    require 'mymodule'

rake understands this as I have lib/ in the load path (see the below code for details.). How do I set the load path in RubyMine? (I'm on 1.9.2 and EAP 96.1146)

Rakefile:

$LOAD_PATH.unshift File.expand_path("../lib", __FILE__)
require 'rake'
require 'rake/testtask'

Rake::TestTask.new(:standalone) do |t|
  t.libs << 'lib'
  t.libs << 'test'
  t.pattern = 'test/**/*_test.rb'
  t.verbose = true
end

Perhaps there should be an option in New Project => Project type: RubyGem ?