Credits go to Frolsa84 for posting about this on the ngrealm forums.

--- new link https://stinger-magazine.com/side-stories/how-to-play-ninja-gaidens-hurricane-packs/

--- old link http://www.ngrealm.com/forum/viewtopic.php?f=13&t=1622#p37945

Be warned that this process is complicated and you will be hex editing binary files.

You need:

• A softmodded xbox
• A usb adapter that plugs into the xbox
• A compatible usb drive.