You can use whatever tool you want, they all will use dism to integrate the drivers. DISM GUI is just a cmd lines running GUI for DISM.
Hi thanks for this great tutorial. I'm having some problems though. Edit: nevermind. I fixed it. Thanks enthusiast for your comment.
That is because you need to put the win 7 install.wim in the win 10 iso or when using the win 8/10 boot.wim it needs the win 8/10 setup.exe inside the sources folder.