The IR543 will only control one house code. There is no way to have 1 Ir543 controlling more that 1 house code. 2 IR543's set on different housecodes would not work either as the "information" would collide and be lost. You could use a relay system with 2 appliance modules to control more than 1 housecode. Also look at the PMC01 Pro Macro Controller. This will allow you 27 more IR to X-10 commands along with X-10 macros and cost less than $100.00.

Chris