I'm a firt-time mythtv/knoppmyth user and I've got everything working except for the built-in ir blaster on the 150.

My config is as follows:
Two Hauppaug dvr 150 tuners connected to two DirectTV D10 recievers.

The video works fine but I want to change channels.

All the information I can find is for old releases and call for installing lirc versions that are older than the one in R5C7.

How do I configure the building ir blaster and how does it know what remote commands to sent to the D10?

Thank you so much for the help.

I wrote the scripts for setting up an irblaster on r5c7. The scripts only support blasters that use the lirc_serial module (homebrew blasters). I have no idea how the 150 irblaster works, but if it doesnt use the lirc_serial module, the r5c7 irblaster scripts will not work with it and you will need to use one of the older howtos to get it working.