Things You'll Need
Instructions
Download MouseAim.
Click on the .rar file that will appear on your computer to decompress it.
Open the new folder called "bio4_mouseaim" that will appear.
Drag all of the files inside of the "bio4_mouseaim" folder into your PC's installation directory.
Open the file "loader.exe." Click on it to open it.
Configure the settings. Decide how sensitive you want the mouse to be.
Click Load Game. Biohazard 4 should load with mouse control.