Alternatively, use community tools like the PowerShell script to merge the driver .zip directly into a custom bootable ISO file.
You need to update a critical driver (like a storage HBA or 10GbE network card) on an existing host.
Follow the prompts until you reach the screen where you select a disk or need network access.
If your ESXi host is already installed and you just need to add a driver for a new expansion card:
Swap the ESXi installation CD with your when prompted by the system.
Boot your server using the standard VMware ESX/ESXi installer media.
The installer fails with a "no network adapters found" error.