It's safer just to download the screensaver version:
Safer as long as you don't electrocute yourself while rebooting the PC after installation.
I have to say you are wrong on downloading the screensaver. I live about 20 minutes from the foot of the mountains here in CO. Less than an hour from the Rocky Mountain National Park.
Until I saw it for myself, there is no way to describe it or understand it.
I do take the developed paths when I go out, mostly because I am a single mom and feel a responsibility to the kids, but I also suffer physical limitations that prevent me from making it more than a mile or two out there. But, when I go, my soul feels refreshed.