Copy the Raw=True-to-False-edited .lcp file to the following folder:
Win: C: \ Users \ *your username* \ AppData \ Roaming \ Adobe \ CameraRaw \ LensProfiles \
Mac: Macintosh HD / Users / *your username* / Library / Application Support / Adobe / CameraRaw / LensProfiles /
Thanks for helping. I think it's almost working now, but still not quite. When I put the file in that folder, restart lightroom and click on Enable Profile Corrections, this time the correct make ("Nikon") and model ("Nikon AF-S NIKKOR 24-120mm f/4G ED VR") are populated, but the profile entry doesn't match what's in the .lcp file, and there's a warning message under the slider bar that says "unable to load lens profile".
The text editor has the following: stCamera:ProfileName="Adobe (Nikon AF-S NIKKOR 24-120mm f/4G ED VR) v2"
LR is showing: Nikon D3X - Nikon AF-S NIKKOR 24-120mm f/4G ED VR
Unable to load lens profile seems like it'd be a problem. I wonder if your text editor removed line breaks or added them or change the encoding to something different. You might redo the true-to-false edit and see if things work any better. If I modify an .lcp on Windows I use Notepad instead of Wordpad, because Notepad preserves the end-of-line characters and the encoding.
The text you see LR's list may not be ProfileName it may be the lens name or lens pretty name or something else. You might want to change each of the human-readable descriptions to have a different version: v2a. v 2b, v 2c, etc, so you can tell which one is actually being used.
Or if that description is replicated for each profile entry then you might need to change them all not just the first one.
As a general tip, I suggest you shoot raw, if anyhow you want edit your pictures in Lightroom. It makes no sense to me to shoot JPEG and edit the files with a tool like Lightroom. It makes sens if you do not have access to the raw files, to enhance pictures that are JPEG.
Does anyone know if the Nikkor 10-100mm f/4.o-5.6 VR lens is in the latest version of LR? At the moment I am using the trial version (CC 2015.5.1) and I can't find it. But it should be there....
It is, but most lens profiles are only for raw format.