It would probably be easier to create a ROMable RAD driver which mounts a ROMed disk image (ADF).
In order to access files via NFS you need DOS sooner or later. At the time when ROM modules are activated, DOS is not yet active. So it's better to let the ROM module add a BootNode to the system and let DOS boot from the RAD disk.
The other advantage is that you can use existing software for TCP/IP, SANA-II and NFS and don't need to care whether they are ROMable or not. You only need to make one new ROMable module.
