Rails Ruby on Rails

I want to have an ability to setup my own class to path convention for autoloading feature, ie:

Normally AS works like that
MyNew::Class::Path => my_new/class/path

I want this:
MyNew::Class::Path => MyNew/Class/Path

To do this I introduced:

• class_to_path_conventions = []
• class_to_path_conventions << lambda { |c| c.underscore }
• class_to_path_conventions << lambda { |c| c.gsub('::', '/') }

Where the first convention is ruby and rails convention, while the second one is mine.
We don't need to hardcode my convention into Rails, but what do you think to setup an API to add someone others conventions?
Please, advise where we can put class_to_path_conventions array into API.