@V3ry_H1GH I'm not going to install this mod, was just curious as to why it wouldn't install properly. It's kinda sad that mods are uploaded without even being tested by their creators to see if they install. There is a similar problem with a Porsche 935 mod. Instructions suck and modder calls it a "porshe", so you try every combination to spawn it but none worked for me.

P.S. Very interesting that this thread has over 2K views - just goes to show that either people don't follow instructions or don't understand them. There is probably a need for some new (2021) how to videos that a 6 year old could understand.

@Lol-Bro224 There's lots of information missing before you can find a solution. For example does your graphics card, and your system overall, meet requirements or exceed them for GTA V. Also, are you able to get more than 30 FPS with other games, without stutter (which can occur at high FPS too)? Desktop or laptop?

Are you using an AMD or Nvidia card and a new or old generation Monitor. New cards and new monitors handle VSync (different flavours) differently. As was suggested above, is your graphics driver updated? This is an old game so unless you are at minimum specs you should be able to run fine.

For fullscreen optimization: Find your GTA5.exe, right click, properties, you will see a tab called Compatibility. That's where you should find the checkbox to disable it - likely unchecked.

Remember "Google is your friend", even though Google is evil. What I mean is do a google search. I found this, it might help.

@V3ry_H1GH My textures are the originals - no? I don't think anything loaded. What bothers me is that people liked this mod, so did they install it in multiplayer?

@V3ry_H1GH Going to install it. Will let you know.

UPDATE: I've installed about 50 addons, cars, peds, forests, racetracks, my own props, etc, and this had to be one of the easiest installs. But there were 2 issues. One was finding the stupid place, none of the NPCs knew where it was, and the map that the author gave didn't really help - I guess he didn't know there are coordinates.

The bigger issue is that the map isn't displayed. So looks like we both were unable to install this sucker. I added the coordinates in my screenshot. I needed to rent a GSX to find the place.

I'm wondering if it could be a cache issue - the old one still being in memory.

@V3ry_H1GH No worries, but this particular issue is related to car addons specifically, not MLOs (which I've never installed myself). Also, the cause here is 100% clear - the folder structure of the OP is wrong. This should have been resolved a few posts ago, hopefully it will be soon.

Is this your first addon install?
Your images do show the correct path to the addon, however they don't show whether you have the full structure: Mods, Update, X64, dlcpacks etc, with update.rpf properly placed as well.

@V3ry_H1GH You can hijack cars in GTA V but you shouldn't hijack threads.

@JohnFromGWN I also noticed you have a data folder in with your Mods folder. Delete it. It shouldn't be there.
The data folder is including the Update.rpf - do not extract it or move it.

You can't just copy files and folders randomly, it won't work. Delete your Mods folder and follow the steps above.

You didn't fix your folder structure. It's wrong, no need to reinstall. As in the reply above, your folders should be like this:
\Grand Theft Auto V\mods\update\x64\dlcpacks

You don't have an update folder. You need to create it.

1. Go to Mods Folder or preferably delete everything in your existing Mods Folder cuz it's a mess.
2. Create/Add an Update Folder in your Mods Folder
3. In your Update Folder put your x64 folder, also put the file called update.rpf
4. In your x64 folder put your dlcpacks
5. In your dlcpacks put in your rs62

Now go back and run OpenIV, and re-edit the file dlclist.xml if necessary.

Follow this to the letter and your problem will disappear.
There is another step, copying patchday24ng to your dlcpacks - but start with this and it will work.

Seems like you have two scripts/mods which are both using the F3 binding. One in your trainer, and another in a script (barrier).
Look for ini files, either Simple trainer or the mod/script and try to use another key.

@Terraxxx365 Hi. You rarely need to reinstall your game. It's perfectly normal for Open IV to delete the line in dlclist.xml because it means the addon is not in the right folder. You shouldn't use the original folders. "When you hear hoofbeats, think of horses, not zebras"

Please send another picture, like the first one - i'm sure we can find the issue.
Also, please send a second picture that clearly shows where dlclist is, the one you are editing, not the original game one, in Open IV. Just to check the location, these things can get tricky but once they are setup everything will go smoothly hopefully.

Cheers
P.S. If you are using the Steam version, do a verify integrity (not a reinstall). Sorry don't know the equivalent with the other version.