Installation :: Add Third Party Package To Project?

I am having a silly beginners problem with ASP.Net/Visual Studio 2010. I would like to integrate a number of third party packages into my asp.net MVC app (e.g. CKEditor, TinyMCE.) During the prepwork I sooner or later end with instructions to the order of "copy the package into your project/scripts directory". Sounds easy but I still can't figure out how to do it.

For the time being I trick visual studio into adding the package by adding a blank directory, then go to windows exporer to copy files into the directory, then go back to visual studio to add them one by one. That works for a few javascripts but not for a more complex package. Clearly there must be a better way to add a third-party hierarchical structure to a project, right?