Before we start you must own RE2 legit for the mod manager to work.

Frist Get the Mod Manager @ www.fluffyquack.com/WIP/modmanager.rar
Extract the rar anywhere, I placed inside a folder called Fluffy.
That folder can be anywhere you wish I placed it in the root directory of RE2


Now on to the fun part head here
\Fluffy\Games\RE2R\Mods
in my case it's
\RESIDENT EVIL 2  BIOHAZARD RE2\Fluffy\Games\RE2R\Mods

Open my mod "Classic UI" and extract it there or just place the rar there the manger reads that too.

Now once you have the rar inside the mods folder start the mod manager as administator (Don't worry it's needed to rewrite RE2's main file for modding)
once started you should see the main menu if not theres a button in the top right labed "Menu" click it if you don't see the main menu.

Locate the option "Game" and click it, "Select Resident Evil 2 Remake", "Manage Mods", "Full Mod List"
Almost there!
Click "Re-read game archives" after that's done my mod should be listed in said menu
Click on it and the manger should be installing it after that....

Launch the game and Enjoy!