Messages

I don't like software with goldselling service banner on it's web page, it looks like unsafe. More secure way to keep addons up to date - use ACE addons and WowAceUpdater. I recommend WowAceUpdaterAdFree - it's even more safe because of recent attacks via banners (java script with password-stealing trojan).

"M2UseThreads 1"
Didn't noticed any fps changes (I have AMD Athlon X2 CPU)
also, there is no such variable in config.apple crumble file. didn't checked by myself, but many people reported that both cpu cores loads anyway by default, without this option enabled - you can see it in the task manager.

Changed other options listed above - it's awesome! Graphics looks much better, FPS didn't changed.