You can play Original Xbox backups without that NETISO plugin as long as you have the hacked/unlocked xefu emulator. The backups I made years ago would not be considered proper, as-in, game partition only, without security sectors. However they do work.
But as neat as it is running backups from DVD-R on a stock DVD drive, it would be better to save the laser and run them from USB and/or HDD.
What I personally would like are apps to:
1. Make a full ISO backup for Xbox 360 and Original Xbox games whether to split them on a FAT32 drive or a full ISO to an NTFS/exFAT drive.
2. An app that supports NTFS and exFAT and allows mounting ISO's to boot them from the dashboard's disc menu like a retail disc.
This does just that lol the NETISO plugin i just didn't bother with the ISO over SMB part 2 in 1 special lolz... This is from NETISO readme...
NetIso 1.0
----------
================================================================================
Overview - what it does
================================================================================
- plugs in... it is a plugin after all
- allows disks burned for flashed drive to work in unflashed drives
- allows disks burned for flashed drives to work in unpaired drives (dvd key lost etc)
- allows a directory of iso(s) to be served to the console as if a disk was in the drive
- allows NXE install of normally installable disk images
================================================================================
Overview - what doesn't do
================================================================================
- will not allow simultaneous use of of connectx and this
- will not allow retail/real disks to work in unpaired drives
- does not emulate the hv/drive security layer
- does not interfere with real disks when a server iso is not mounted
- does not, on it's own, provide a way to choose server isos
================================================================================
Installation
================================================================================
- make sure your Aurora plugin is up to date (to be able to select isos from the server)
- put the server IP in a txt file 'netiso.xex.txt' (sample provided) either beside
netiso.xex (if starting from dash launch ini with a recent version of dash launch)
or on the root of the content partition on the internal hard drive
- once the plugin is running, it defaults to disk mode (and will assist burned disks in unflashed drives)
- once Aurora plugin is running, you will be able to use the Guide File Manager menu
to mount (or dismount current) disks from the server via the Smb: drive item