Hello Bryan,
I'm running a dedicated bootcamp partition for FSX on my iMac and so far I have installed A LOT of addons in the last months and everything works like a charm. One of them is FS2Crew for the NGX, one of the best addons so far. I wouldn't fly the NGX without it anymore! I don't own the Airbus X but an addon like FS2Crew would convince me to make the purchase. But at the moment upgrading to Windows 8 is not an option for me, too much work to do just for making a single addon work. I read about Vistalizator, but my head started spinning after I read all the problem that this installation can give.
Please don't get me wrong, your addon is a fantastic piece of software and worth the effort. But I can't think about all the hours I have to spend to reinstall everything (Windows included) after getting home from work at the moment, considering I work in IT and I have to solve problems related to PCs all day long, eh eh.
If a button version is coming I'll consider seriously a purchase, both for the Airbus X and for FS2Crew for Airbus.
Keep up the good work and thanks for FS2Crew!