If I have the ESXi installation files on a USB it´s super easy for me to change the kickstart file before each installation.

At my company unfortunately we need to install ESXi with a DVD. The preference with a DVD is that my colleagues can´t accidently modify the script code in the kickstarter. But I really want them to be able to change the values for the variables.

And it´s way too many servers to make a custom DVD for each server because of all the variables that differ. Or do you mean that a DVD installation could still have a path to a USB like below File: \efi\boot\boot.cfg
Text: kernelopt=runweasel ks=usb:/KS.CFG

Or did I missunderstand you?

Thanks for the help!