I tried to google Fly Aways A330 Mega Pack but I couldn’t find any relevant information about this.
What kind of email are you getting and which one you’re referring to?
The only A330-900 addons I know are the Headwind aircraft addon, and the individual liveries posted on flightsim.to website.
UPDATE: I just found it that you’re referring to this. It’s basically a mirror of the same thing I mentioned above. I’ve been using this aircraft that I got from flightsim.to for a few weeks now, and I quite like it. It’s still a bit too difficult to taxi but too prone to winds like a kite. But it’s generally flyable and it looks and works much better than the PMP A330-300 version.
You don’t need to download the FBW A320 as while it’s using the FBW A320 systems, it’s actually independent and you can install it without the FBW A320.
I got mine from here. Which I think it’s updated much more often than in Fly Away website.