I have just configured ESXi on my new Intel NUC – NUC5i7RYH (Intel NUC i7-5557U 3.1GHz 16GB 256GB SSD).
Due to incompatibility with ESXi-Customizer on Windows 10 – I used the now recommended: ESXi-Customizer-PS Power CLI script.
Following the instructions at the ESXi-Customizer website: http://www.v-front.de/p/esxi-customizer-ps.html with installing the VMWare Power CLI PowerShell dependencies onto my workstation (you need a register My VMWare account to download this directly from VMware).
I was able to use the following command from the directory where the PowerShell script was saved:
.\ESXi-Customizer-PS-v2.4.ps1 -v60 -vft -load sata-xahci,net55-r8168
This will make the script connect to the V-Front Online Depot and add the sata-xahci and net55-r8168 packages from there to the latest ESXi 6.0 Imageprofile.
Entirely with no user interaction it was able to download the latest v6 ESXi release and slipstream the sata-xahci drivers leaving a clean ISO I was then able to use Rufus with the default settings to deploy the ISO to my USB Flash drive which was then used to install on the Intel NUC successfully.