You cannot do as desired. You must have one cable per receiver. I'm not real up on the particular LNBs required. You may already have it. Someone with more knowledge please chime in.
-Standard definition programming really only requires the 110/119 using a DP Twin Plus.
-Eastern Arc installs would use the 1000.4, which uses a DP Plus LNB as well I think.
-High Definition programming elsewhere would probably use a 1000.2 dish, which has a DP Plus LNB.
-You can also pick up the 129 or 61.5 for HD programming using a second dish with a DP Dual plugged into the DP Twin Plus input port.
With any of these setups, you MUST have one RG-6 coax sweep-tested to 2.25 GHz or greater running to EACH dual-tuner receiver.