Documentation - Drivers
Use the insert button to insert which driver folders to integrate by selecting any inf file from it.
Once the insert button is pressed you will get 2 options: Single driver or Multiple drivers folder. First one is self-explanatory, and the second one is useful when you keep all your drivers separated in subfolders inside some unique folder, then you can point to that main folder with this option and it will prompt with the list of all found drivers for faster selection which to integrate.
In the Already integrated drivers box will be listed found drivers from previous vLite sessions and you will be able to remove them, so you can easily update the drivers from that image. Just mark for deletion old drivers with Delete mark button and integrate newer drivers in the Integrate drivers list box, once the changes are applied the distribution will contain only the newer drivers plus unmarked once from the older session, if any.