This is the old basic template for a freedos netboot Package
based on
memdisk from syslinux-common_3.71+dfsg-5_all.deb
freedos image from
www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.0/fdboot.img

needs directory SERVER_DATA instead of CLIENT_DATA

OPSI control File

[Package]
version: 1
depends: 
incremental: False

[Product]
type: netboot
id: freedos
name: freedos
description: template for freedos Bootimage via opsi/pxelinux
advice: uses memdisk from syslinux-common_3.71+dfsg-5_all.deb and freedos image from www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.0/fdboot.img
version: 1.0
priority: 0
licenseRequired: False
productClasses: 
setupScript: none
uninstallScript: 
updateScript: 
alwaysScript: 
onceScript: 
pxeConfigTemplate: freedos

SERVER_DATA directory

bonifax:/home/opsiproducts/freedos# tree SERVER_DATA

SERVER_DATA
└── tftpboot
    └── linux
        ├── freedos
        │   ├── fdboot.img
        │   └── memdisk
        └── pxelinux.cfg
            └── freedos

PXE-template file SERVER_DATA\tftpboot\linux\pxelinux.cfg\freedos

default floppy

label floppy
  kernel /freedos/memdisk 
  initrd /freedos/fdboot.img