There's some VERY dodgy downloads out there - you wouldn't be the first person to turn your RNS-E into a very expensive brick if you use one of them.
Version 0660 is NOT official Audi software, you're reliant on the hack having been properly done - plus you'll need to rewire the phone mic via the RNS-E to get full SDS to work.
Why not just get a legit map DVD off eBay, amongst the copies there ARE some genuine Audi DVDs - yes they cost more but they are far more reliable (the only time I've ever had problems reading a map DVD are when I've used a copy).