1. Extract rar.
2. Read this text document.
3. Place "MIG-21bis" inside %USERPROFILE%\Saved Games\DCS\Kneeboard

4. Enjoy :D

Add me on discord if you need help! -> Flokko#3144
This guide is based on Laobi's video "1 Minute DCS - Mig 21 Bis Startup Tutorial"