Don't. That file is rom-dependant and should only be used with stockroms (or roms very, very close to stock).
Also, that bt-quickswitch is already disabled in cm9 and didle is working just fine out of the box.
Wait, is settings-app crashing when checking didle-stats still your problem? I get that as well, just never noticed it because I use nstools for that (which works).
So, download it from market and stop messing with your sys (framework). Looks like a bug in the cm9-settings to me.