I could be wrong on this ....
a) I believe if you downgrade to 1.04 those files will no longer be accessible
2) I believe http file access will be available in a future firmware release - there is an undocumented web page - http://<ip-address-of-DNS>/web/wfs_login.asp.
The way I heard it, preliminary code for the http file access was left in the 1.05 release leading to the insecurities that have upset many persons.