Alright, good news. Support for Vista 64-bit should work in a couple moments.
Basically, the issue was this. I was checking for FSX's directory by checking the registry, like any sane programmer would do. I checked the "HKEY_LOCAL_MACHINE" section though.
I discovered, that whilst the entry is made in 32-bit Vista (it would seem) and all XP versions, it isn't made in the 64-bit version. I'm running Vista 64, so I would know now

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All I have to do is go back to checking in "HKEY_CURRENT_USER", the entries of which still exist

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I still haven't resolved the Shortcut problem though. That will come next

. Installing Acceleration at the moment

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That was copy/pasted from FSW

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FS Water Configurator+ has new modifications in the works, plus DirectX 10, Service Pack
1, and Radeon HD 3+ Series support.