It is your responsibility to ensure all the accounts with access to the RC has ip ranges set and their rights are only minimum to allow them to do their job properly. You should have done this long ago. Also, you and your staff should keep up-to-date back-up's of the levels and npc's every time a change is made.
Oh well, I guess Nemesis and crew will be making sure that his rules are enforced on all servers, like the ip ranges on the accounts and such. Good-luck re building the scripts.