Folder Tree Security

I'm creating a tree menu that uses FSO to read folders, subfolders and
files. I'd like for each folder to have capabilty of being either Level
1,2,3,4 or 5 security. The 5 Levels are my security levels with 5 being
Admin.

I'm looking for any advice on how to go about this. I was thinking of
creating a hidden text file within each folder and storing the folders
security level in it, then let asp read the text file as it builds my tree
and display the appropriate folder icon representing Level 1,2,3,4 or 5
security.

Anyone go a better idea? Perhaps an XML tree