Regarding N9QTweak I recommend to wait with usage until you know what it can do and/or destroy

About Nokia account prompt:
what exactly did not work?
http://talk.maemo.org/showpost.php?p...2&postcount=55
Did you execute command(s) as root?

Google sync and 'Exchange'?
maybe I am wrong but do they match together at all?
if so then it might be the N9 does not support TLS1.2 (still only SSL and maybe TLS1.1).
But I never used that google thing but set up mail only manually...

emojifix:
all the info is bundled here
https://talk.maemo.org/showthread.php?t=94027
especially here
http://talk.maemo.org/showpost.php?p...&postcount=150
and on this page
https://talk.maemo.org/showthread.php?t=94027&page=14
http://talk.maemo.org/showthread.php?t=90750

But be careful:
read about aegis before modifying system relevant files!

--edit
and I recommend juiceme's ubiboot (open kernel)...