Creating a folder in Finder/Windows using a PS action

I need to build a folder hierarchy on the Desktop and place files in it using a Photoshop action. for instance:

Master Folder Name

- High Res

-- HR_filename.jpg

-- HR_filename.png

- Low Res

-- LR_filename.jpg

-- LR_filename.png

- Master

-- master filename.psb

Using javascript (so that it's portable between Mac and Windows), is there an simple way do accomplish this? Perhaps a tutorial? I'm having a hard time finding good info in the forums - it keeps asking me to start a new post.

Thanks