How can I use Xenia Canary save data on an unmodified Xbox 360?

I extracted the FM3 game data, modified the database, and made it possible to buy the Unicorn Car anytime. Then I imported the save data and account I was using on my Xbox 360 and bought the car I wanted in Xenia.

Xenia is unstable, so I want to use this data again on an unmodified Xbox. Does anyone know how to repackage the save data extracted in Xenia?