Hi Steve,
I have also contacted FTMO with regard to using third party EAs. There response was they only apply the third party rule to funded accounts and not to Challenges / Verification accounts. Petko has also stated you can change the magic number to make your EA unique. You can also change the indicator perameters by the smallest amount allowed in the EA properties box to also make your EAs unique. However, you do not need to do this until your account is funded. I would recommend you contact FTMO again and verify the third party rule only applies to funded accounts.
Alan,