how to program channel confirmation code

Hi all,
Problem is that the Comcast box requires to press the "ok" button after entering in the channel. I have no way to do it. I see in sagetv when I go to setting up the source tuner, in tuner control you can enter a code for channel confirmation after entering the 3 digit channel. But that seems to be using the channels 0-9. So that doesn't work as I cannot reprogram one of them as the "ok" button without losing the coraposding channel number.
Any thoughts?
thanks.
Problem is that the Comcast box requires to press the "ok" button after entering in the channel. I have no way to do it. I see in sagetv when I go to setting up the source tuner, in tuner control you can enter a code for channel confirmation after entering the 3 digit channel. But that seems to be using the channels 0-9. So that doesn't work as I cannot reprogram one of them as the "ok" button without losing the coraposding channel number.
Any thoughts?
thanks.