Browse and add downloaded kexts or just drag them to the window.Open Kext Wizard & select Installation tab.Trim Support (only if your drive is SSD).Click continue, continue, continue, agree.Download and run Hackintosh Vietnam Tool.The install process will take up to 30 minutes.Check all (battery percentage & Trackpad ….).Boot-loader -> Clover -> check all the three (standard, EFI, UEFI).Select your drive “macOS” then customize.
This is my working install guide for macOS sierra 10.12 on HP elitebook 840 G1, i5(4300U), Intel HD 4400 (tested on both azerty/querty & 1600x900 / 1366x768 models)