Installation via PMDG Operations Center 3: 

1: Extract the *.zip file to a temporary location, ie desktop
2: Run PMDG Operations Center 3. 
3: Choose the 737-700, then Import.
4: Choose the 'sbi_cargo_vpbem.zip' folder and hit open.
5. After installation was successful, start MSFS, choose the installed livery and enjoy!