I think it would be very difficult to do this with RTI. You might find a solution using the browser in the T4 but it would not be a good one.

AMX and Crestron can certainly fo this. The modules from this company make this easy: http://www.autonomichome.com/ , although I think Crestron has its own module. Please note that Crestron and AMX are not regular remote, are quite expensive and can only be bought from and programmed by certified dealers.