true...
sadly, I knew it was meant to be exclusively for PR1.1, in spite of that, I only tried 1 tweak, Speed up transitions...
since then it`s been pretty tricky with my N9...
I just tried to delete all accounts again and re-set the device, then added them again, unfortunately it didn`t change anything...my Mail app is still empty, though I can go to GTalk...
anyway, after restore in phone I was able to download Home Screen Sett...it works