change your content browser view to either 'view folders as list' or 'view folders as tree'
when the content pane is open(in font of the scene pane) at the top right is a down pointing arrow, click on that to get your choces of how you view the content.

sorry if this sounds condescending, but i do not know how much experience you have with the Studio interface.
either view will show exactly how the folders in the runtime are on the hard-drive.

if the Content Manager is not to your taste you can rearrange the folders how you would like , as long as you stay within the constraints of a Poser type runtime.

only caveat is that DS specific content should be kept in the main content folder, although certain files can be kept in the same folder as poser ones of the same file name, and DS will automatically load its own file when you double click on something to load it into the scene, ie material settings.
hope this helps.