In order to adjust ERPXE to the local IP Address of your server you first need to adjust your DHCP server settings:
Microsoft DHCP Server:
adjust rule 66 to NEWIPADDRESS.
Several plugins use HTTP/NFS/SMB protocols to mount the rest of the OS after the first KERNEL,INITRD stage.
In order to mount the files from a correct location you will need to edit the .menu file included with the plugin.
Just look for the string 10.0.0.1 within the .menu file and replace it with your IP address.