I was doing an FS9 Time Capsule Build for nostalgia, so actually the dated scenery was desirable. Obviously this thread isn’t going to apply to anyone wanting the latest and greatest sim experience. Just wanted anyone interested to know that the XP sceneries can still be activated, which is amazing.
If with "XP sceneries", you mean sceneries using an old installer using Esellerate, then no, they cannot be activated, simply because Esellerate is no more, but we have the updated Addon Manager for FS9 that allows them to activate on our current QLM/Soraco system. It's the one and only way to activate any FS9 scenery for FSDT today.
Yes, the instructions say Window 8.1 is the minimum required system but, it doesn't mean we are 100% sure it is, it only means is the only OS we support ( because anything older is out of support from Microsoft ), so we cannot guarantee compatibility with it, but since lots of users seems to still be on Windows 7, I took one day off normal work to do some proper testing, and it turns out than yes, if you update Windows 7 and .NET to the latest version using a specific MS installer, you CAN use Windows 7 too. Instructions how to do this have been posted as a Sticky thread in the GSX for FSX/P3D section of the forum. Other than those instructions, you won't get any more support from us trying to run on an unsupported OS.
Now, that was for Windows 7. I don't think the same can be said for XP, which is quite different but, again, you never know. But we are not going to spend any time trying to find out this time.
The only thing 100% sure: you MUST use the latest Addon Manager for FS9 to activate anything today.