From what I understand - you need to purchase a remote that has the IR543 codes built in. I think that radio shack have them. Make sure that the remote is sending IR - not RF signals. The remote from x-10.com send RF so the Neo nor the pronto can learn these codes. After you get the new remote set up for the IR543 use the Neo to learn them too. The Neo is very touchy when it comes to learning IR codes as I have found with the replay remote. But with a litte patience it should work. I keep you posted on my progress - I plan on working on this this weekend if I can locate the parts I need by then.