Link another folder to add items

Hi,

I'm using CCS6.1.

If I want to link to all of the source files from a particular folder (and sub-folders) for a project that are in a different directory than the project so that they show up as the folder name, and then I can expand it to show the files underneath in the project explorer, how can I do this?

The only thing I have been able to do is link to each file individually which means that each file shows in the project explorer.

Thanks,

David