WOW, what a simple change that is a huge success for users like me, and will be a long-term success for D* business customers, i.e. bars, etc.
The options for 8 IR remote codes are simply 00001 through 00008. Originally, when set to the alternate set (AV1/AV2) the receiver used code 00003.
That made havoc for me using the Slingbox (which would be MUCH easier if D* could ever setup the receiver to do IR & RF simultaniously) work without special drivers.
There was a driver file made by a user for the 00003 remote codes, but the new Slingbox Pro-HD didn't work with it. The Slingbox software does, however, have built in drivers for the 00002 code (listed as the D10 remote code 2).
SO - THANK YOU DIRECTV ENGINEERS for enabling multiple IR addresses. Although a feature that will get rare use - to some users - it is HUGE!