I already know how to:
Go into the 2.65/Scripts/Addons/ or 2.65/Scripts/Templates/ folder and paste a .py file.
Go to the text editor, click on the Templates menu and load the Template code in the text editor.
Is there a way to load a .py file in the Addons folder to the text editor directly via the Blender user interface without going into the backend and opening a .py file in the Addons folder with an external text editor and copying and pasting the code from the external text editor to the Blender internal text editor?
disclaimer: I understand that this function may in some ways be counter productive especially since some addons are directory based and have multiple files.