Change Remote Address in DirecTv D10 receiver

[scrub8]

I'm going to stack 3 d10 receivers in the same room. How do I change the remote address in the menu so that each receiver will only respond to its appropriate remote control?

[jdspencer]

Page 17 in the manual explains using the remote for a second receiver, but not three. :(
http://www.directv.com/learn/pdf/System_Manuals/DIRECTV/DIRECTV_D10.pdf