I am not advocating anything illegal by no means, if I did.........OOPS, not intended.
I just think there are going to be issues UNTIL a simple and legal fix is come up with, whether it be through MS or someone else who gets approval.
It's going to be a bit before this is all settled, and it might be wise to hold off on installing a bunch of FS9 acft. that are converted to work in FSX.
Time will tell on this one.