How to change dhcp location

[ccmiens]

Hi,
I want to move dhcp to fog server. How to do that?
Currently :
Fogserver dhcpd.conf is installed on 10.1.1.254 (debian)
if substring (option vendor-class-identifier, 0, 9) = “PXEClient” {
next-server 10.1.1.252;
filename “pxelinux.0”;
}
I want to put it on 10.1.1.252.
Installing overwrite gives:

Here are the settings FOG will use:
Distro: Ubuntu
Installation Type: Normal Server
Server IP Address: 10.1.1.252
DHCP router Address: 10.1.0.15
DHCP DNS Address: 194.57.XXX.XXX
Interface: eth0
Using FOG DHCP: 0
Internationalization: 1

without possibility to change to use FOG DHCP
Regards