How to configure external DHCP server correctly?

[Vexz]

Okay this kind of works. The initial problem is gone now and I can see the ISO-selection screen. Though it seems like I only get a completely distorted screen when loading any of the ISO files. I tried multiple ISOs like GParted, OPNsense, Windows 10 Setup. Is this normal because the development of iVentoy is still in its early days or can this be fixed with some configuration changes?

My current boot configuration of iVentoy looks like this: