[mythtv-users] Two things: Completely disable CEC? Manually add channels?

[DaveD]

Is there a way to completely disable CEC without having to add a switch 
on the command line?  Like a DB or config file setting? All I've found 
is the -O libCECEnabled=0, but I keep forgetting it (when I'm not using 
a shortcut, alias or script) and turning off the TV while my wife is 
watching a mystery, just when the bad guy is about to be exposed!  (my 
frontend/backend has a console where I do this stuff and it's also 
connected to the TV which has a cable STB she uses while I work)

The other thing I would like to do is manually add a channel. Scanning 
for channels finds some channels with the antenna facing north and 
others with it facing south.  Some channels work better with a preamp, 
others are worse.  I've amassed a list of all the channels I CAN get 
using scandvb in multiple configurations.  Is there a script that could 
populate my database using those files? Or a way to tell Myth to scan 
again without deleting existing channels?

Dave D.