Si alguien se anima, en xda un usuario ha creado el regedit adecuado:
1. Run Kies
2. plug in your phone
3. Once connected run file JM2XEE.reg which i have uploaded here
4. Click yes to allow
5. Once done click upgrade in kies
6. Now you see the update for JP6
Hope this help, makes it easy then to edit regedit.
Download
http://jump.fm/YNSQU