Sure there is a way ,but I've not really tried to mess with it , still works without it ,but only with what is already on the remote. Looks like Xbox 360 , DVD, CD Player , VCR , Radio , Tivo , mini system .
To be honest I've not messed with it much , it's been unused for a long time , I know you have to download the harmony software for it and from there you can do all kinds stuff , sorry not sure of everything . There is a password ,but can't remember what it is so I have no way to add anything without that password first .