File permissions under ME!Any solutions?

I’m a system enginer in an internet lounge. We’re using WinME on the computers. I planning a “multi-level security system” and on one of the steps I would like to protect files from the customers from deleting And/Or modifying. I’m looking for a solution like NTFS permissions but I would be happy if the selected file couldn’t be deleted/modified (password protection or something. Is there any solution for this?

Waiting for answers,
H0PE