Ласкаво просимо на GTA5-Mods.com

if you install the base pack using OIV will it change your gameconfig file? (assume you run the uninstall via OIV it restores?)

Completely new to modding GTA V and want to give a couple of mod's a try (below) and have some questions:
https://www.gta5-mods.com/vehicles/vanillaworks-extended-pack-add-on-oiv-tuning-liveries-vanillaworks-and-other-modders
https://www.gta5-mods.com/misc/improvements-in-gore
1)Both of these seem to recommend installing via a program called openIV - however interested to install then
via the mod manager so I can switch between single player and online easily - is it possible to install them via
the mod manger? (if yes how can you do this)
2)Will i need to install the hook and hook.net software directly onto to the game for mods to work?
3)Actually downloaded OIV and can see its an auto install .exe -can it be used/installed with mod manager?
4)Can see the mod manager seems to setup a rule on windows firewall - I run win10 but use G Data internet security will
mod manager automatically change the rules for this software or would I need to do something manually? any help appreciated....