How do I remap channels?

[rbmcgee]

The GB-PVR guide (fed by SD) reports my local channels as follows:
8-1 = 641
8-2 = 642
8-3 = 643

When I try to tune to the channel, obviously, it tunes to 641, etc. My Directv box wants 8-1 (641 isn't a channel).

How do I tell GB-PVR to tune to 8-1 when I select 641?

BTW, It would be nice if the channel was placed in the correct order in the guide and also displayed the correct channel number.

I have reported the channel issue to SD a couple weeks ago but have not received any feedback.

[sub]

You'd probably have to use something like HIP or Girder if you need to send major/minor numbers to a set top box via an IR Blaster. GB-PVR has no understanding of this North American specific channel naming sillyness.