You're going to need kineto_gan.ko as well as the APK, I had them copied over to CM6.1 when I installed it.
Did you make a nandroid backup before flashing? Just restore, grab the two files you need then restore back to CM6.1 and copy them in? Posting them here would make them Warez and they'll get pulled.
Does your phone detect your mobile number correctly? Mine never did. Caused a few "irregularities".
Wifi calling seemed to work though.
There's no place like ::1
(Now with IPv6 Compliance)