I tested on a friend's Vista 64bit non-SP1/non-SP2 OS installation, and can confirm that it gives exactly the same identical results as Vista 32bit SP1 and Vista 64bit SP1 - that is, the installer gives the same old DLL errors while using a pre-existing portable installation of the VN works perfectly fine except for the OPs which gives the same old errors I've had on Vista SP1 and Vista SP2.
Of possible interest is that said friend's Vista PC was running an Nvidia GPU that supports AVC h/w acceleration (GTX 260) which is not something I had previously tested on.
The same friend also had an older XP SP3 PC that I tested on as well - it too gave identical results to what I got when I previously tested on two of my PCs that ran XP SP3.
The trick is to open the menu by holding down your left mouse button rather than just clicking, then doing an alt+printscreen will not close the menu.
(fun fact, back on OSs ~25 year ago you
had to hold down the mouse button in order to open the menu, and then letting go of the mouse button would select your option rather than you clicking again)
Also, if one isn't too OCD about being exact, you could probably round the scaling values to the nearest tenth; for all except one listing that would simply mean just dropping the ending zero (so, instead of 0.80x, it'd be 0.8x) while the one exception, 1.28x, could just have its label be rounded to 1.3x.