@koyser I don't know this mod, don't use any mod scripts other than my own, but if it was an OIV installer you can unzip as you would any zip (archive) file.
Inside you will see a file called assembly.xml which will tell you, in xml language, what files were copied where. You can then delete mod only files and replace any files that were overwritten with the vanilla versions. A PITA but only way to restore.
As for gameconfig.xml, you should have a version that matches the your game version - if not you will likely have crashes.
None of those mods affect reflections. They primarily Timecycle edits, with texture updates. Reflections are handled elsewhere in the games engine, and best accessed through ENB. All 3 of the named mods include their own ENB settings that, when paired with ENB will give you the kind of reflections you are looking for.
With that said, if you do get them working, your framerate will suffer immensly. I have 32GB RAM, an i5 2500k OC'd to 4.3GHz, and a GTX1050ti, and I struggle to get more than 20FPS with the graphics and ENB ramped right up, I would be surprised if yours manages much more than 10fps with the settings cranked.
@JohnFromGWN Thanks for the link. I did download that tool a few days ago, but my rig doesn't have Accel on it and I can't see purchasing it for a $100 a year just to modify the files. I did download the trial version of Accel, but you only can use it for a few weeks before Microsoft wants to bill you. Having never used it before, the learning curve and time limit are a bit tight.
I'm not opposed to manually editing the files, that's what I did before, I've just forgotten what I need to do to get the traffic how I want it. All the tutorials I've found are geared to adding new dlc vehicles to traffic rather than editing the vanilla ones to respond differently.