Download Map Editor & Menyoo to YMap Converter Map Editor & Menyoo to YMap Converter is a required tool to install the YMAP mod. In that case, make sure to check out this topic on GTAForums to stay updated. Installing Script Hook V is pretty simple, but the only downside of this tool is that it becomes incompatible whenever GTA 5 has an update.
In other words, you need Script Hook V to read and run *.asi files. Scrip Hook V is a library that enables the utilization of script-native functions within custom *.asi plugins. However, you should follow and install them to cover all the issues that might happen before or during installation.
Therefore, you must install some tools in advance to allow the mods to work on the vanilla version. First and foremost, it’s worth noting that GTA 5 doesn’t have a Steam Workshop (although you can play it via Steam), so you can’t install mods by clicking “Subscribe” like the other games.