Is the limitation in the distance due to the power or to the IR? I remember I did a job once where there was a RP6 in the Master Bedroom's system and another one in the kid's bedroom. The father wanted to be able to turn off the kid's system from his remote in the Master Bedroom and we ran Cat5 from one RP6 to the other between signal and ground. I think we went above 100 ft. I believe we doubled the gauge though.