Upload images question

Hi all,

I am a newbie to modx but starting to really enjoy the flexibility, but...
I have built a site where if you have a page called ’Home’ the page template looks for a folder called ’Home’ (within assets/mainImage/) and includes all those images in a slideshow, which are uploaded by the client. This works well, but I don’t really want the client to see all the other folders. So here is the question, one can I hide all the other folders from that user group, or do should I create some sort of TV to create a folder and allow the client to upload the images...

Any help, advice, ideas welcome on this one...