I currently have a hr-24 and 2 h23 receivers and Whole Home service. I am planning on replacing one the receivers with a hr 34 hmc. If I keep the hr24 and replace one of the h23's with a hr34 can I specify from the hr24 or hr34 which hd dvr I want it to record on? Also, how will the h23 know which receiver to record to? Thanks for any help.