I have not been able to text it myself so please let me know if it works.
It my not rehash and resign correctly so make sure you do rehash and resign the file.
Download v1.2 From MediaFire
Virus Scan From VirusTotal
1. Extract the GAMES-AUTOSAVE from your Device.
2. Open it with the Editor.
3. Change the values, then hit Save File.
4. Rehash and Resign, then inject back into your Device.
5. After starting Rage, Load your AutoSave.