Folder security issue

I’ve to share some folders on my 2000 server with full access to ACCOUNT group, b’coz there DOS based accounting package requires full access to use it. By giving full access now every ACCOUNT user is able to view all the folder, can modify or delete them. I just want to protect them from being deleted.

Is there any way or software or utility that can help me do this :::— “No client can delete the folder from server”

🙁