Assuming you are using a relatively recent version of Blender, did you try opening the User Preferences editor (CTRL ALT U), selecting the "Add-ons" tab, scrolling down to the selection
Import-Export: Raw mesh format (.raw)
and clicking on the button at the extreme right, to activate the add-on?
Did you then click the Save User Settings button in the lower left of the editor window to save the activation of the user preferences? If so, then you should be able to open the File menu in the info window, and find the ability to import and export files in ~.raw format in the appropriate sections of the menu.
I don't see where you show the version of Blender you are using in your question, but the add-on has been part of the Blender distribution since at least version 2.63a.