I'm trying to "require" it from the top of a model file.
snippet from the production log:
MissingSourceFile (no such file to load -- shipping):
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in `require'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:in `new_constants_in'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in `require'
/home/crimesc/crimescene/app/models/order_shipping_type.rb:3