FTP Project folder structure ideas?

[eluser]greg.thompson[/eluser]
Ok guys this is as much a logic question as it is a code question but I need help I'm working on a project to kinda help me learn CodeIgniter and I have a perplexing situation. Im making an FTP type of application where you upload files to folders and I'd like to be able to create sub folders as deep as need be. Obviously this needs to be done in a database but I'm confused as how to create the association of the file and how deep and which sub-folder it's in. So if I have a structure like

-Folder
-SubFolder
-File
-Subfolder
-File

And so on. I need to be able to create these folders, and structures but also upload and associate a file. Any ideas? Thanks!

[eluser]InsiteFX[/eluser]
Maybe something like this.

Dynamic Menu

Should also work for other types like yours.